{"id":19,"date":"2020-07-15T12:21:25","date_gmt":"2020-07-15T12:21:25","guid":{"rendered":"http:\/\/creol.ucf.edu\/ulp\/?page_id=19"},"modified":"2025-06-11T17:23:41","modified_gmt":"2025-06-11T17:23:41","slug":"research","status":"publish","type":"page","link":"https:\/\/creol.ucf.edu\/ulp\/research\/","title":{"rendered":"Research Highlights"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-page\" data-elementor-id=\"19\" class=\"elementor elementor-19\" data-elementor-post-type=\"page\">\n\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-bf9aff3 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"bf9aff3\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div 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class=\"elementor-nav-menu--dropdown elementor-nav-menu__container\" aria-hidden=\"true\">\n\t\t\t\t<ul id=\"menu-2-340bf51\" class=\"elementor-nav-menu\"><li class=\"menu-item menu-item-type-custom menu-item-object-custom menu-item-home menu-item-13\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/\" class=\"elementor-item\" tabindex=\"-1\">Home<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-142\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/equipment\/\" class=\"elementor-item\" tabindex=\"-1\">People<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-144\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/open-positions\/\" class=\"elementor-item\" tabindex=\"-1\">Open Positions<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-146\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/research\/\" class=\"elementor-item\" tabindex=\"-1\">Research Highlights<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-145\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/publications\/\" class=\"elementor-item\" tabindex=\"-1\">Publications<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-141\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/funders-collaborators\/\" class=\"elementor-item\" tabindex=\"-1\">Funders\/Collaborators<\/a><\/li>\n<li class=\"menu-item menu-item-type-post_type menu-item-object-page menu-item-143\"><a href=\"https:\/\/creol.ucf.edu\/ulp\/contact\/\" class=\"elementor-item\" tabindex=\"-1\">Contact<\/a><\/li>\n<\/ul>\t\t\t<\/nav>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-cb4c89c elementor-widget elementor-widget-spacer\" data-id=\"cb4c89c\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-3d56233 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"3d56233\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-488bf24\" data-id=\"488bf24\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-3699ca6 elementor-widget elementor-widget-heading\" data-id=\"3699ca6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Two-photon polymerization in strong-pulse regime<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-9b8f08d elementor-section-height-default elementor-section-stretched elementor-section-boxed elementor-section-height-default\" data-id=\"9b8f08d\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-759f69b2\" data-id=\"759f69b2\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-77c16e3b elementor-widget elementor-widget-image\" data-id=\"77c16e3b\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img fetchpriority=\"high\" decoding=\"async\" width=\"300\" height=\"244\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/Capture-300x244.png\" class=\"attachment-medium size-medium wp-image-69\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/Capture-300x244.png 300w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/Capture-768x624.png 768w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/Capture.png 808w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-47a9bb15\" data-id=\"47a9bb15\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-180fb32 elementor-widget elementor-widget-text-editor\" data-id=\"180fb32\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In two-photo polymerization (TPP), also commonly called multiphoton lithography (MPL), ultrashort laser pulses trigger photo-chemical reaction that forms cross linking of monomer molecules to create polymer. It is common practice to use &#8220;weak&#8221; pulses with pulse energies in nanojoule range due to availability of laser oscillators and detrimental effects such as laser damage at with &#8220;strong&#8221; pulses. From an energy efficiency point of view, using strong pulses is beneficial due to nonlinear scaling of two-photon absorption with respect to laser intensity. We model TPP in the strong-pulse regime with pulse energy in the microjoule range and show that there exists an &#8220;optimal&#8221; writing condition for a specific photopolymer where total energy is minimized. This is important for upscaling TPP for practical use in applications such as photonics, electronics and healthcare. <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS2214860422006303&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw0Qu20YhB6cyig3EVAy3faM\" target=\"_blank\" rel=\"noopener\">Additive Manufacturing 60, <\/a><\/span><span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS2214860422006303&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw0Qu20YhB6cyig3EVAy3faM\" target=\"_blank\" rel=\"noopener\">103241<\/a><\/span> <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.sciencedirect.com%2Fscience%2Farticle%2Fpii%2FS2214860422006303&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw0Qu20YhB6cyig3EVAy3faM\" target=\"_blank\" rel=\"noopener\">(2022).<\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-647cab6 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"647cab6\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-2035f8a\" data-id=\"2035f8a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-5f7a4b9 elementor-widget elementor-widget-heading\" data-id=\"5f7a4b9\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Volumetric Fabrication of Miro-Helices<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-17a9695 elementor-section-height-default elementor-section-boxed elementor-section-height-default\" data-id=\"17a9695\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-618b2fe3\" data-id=\"618b2fe3\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4393d4ff elementor-widget elementor-widget-image\" data-id=\"4393d4ff\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"193\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-4-300x193.png\" class=\"attachment-medium size-medium wp-image-66\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-4-300x193.png 300w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-4.png 551w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5354c0cb\" data-id=\"5354c0cb\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-55ae66e7 elementor-widget elementor-widget-text-editor\" data-id=\"55ae66e7\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Based on our previous work on the Bessel beam, we use a superposition of high-order Bessel modes to achieve &#8220;helical beams&#8221; that have intensity rotating along the propagation direction. Pitch, handedness and rotation rate can be tuned by phase modulation on a spatial light modulators. With such beams, micro-helices are fabricated &#8220;volumetrically&#8221; at a speed &gt;100 faster than conventional methods. This work is a step toward mass-production of micro- and nanostructures for manufacturing devices for photonic, medical and other applications. <span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/drive.google.com\/open?id=13_3iyXF3cTP6a5fAVN-3U1n2ZxpydZTh\" target=\"_blank\" rel=\"noopener\">Photonics Research (2021).<\/a><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-cb2fa37 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"cb2fa37\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-b7e3bd0\" data-id=\"b7e3bd0\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8a94089 elementor-widget elementor-widget-heading\" data-id=\"8a94089\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Material Processing with Spatially Tailored Light-Fields<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-a135017 elementor-section-height-default elementor-section-stretched elementor-section-boxed elementor-section-height-default\" data-id=\"a135017\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;background_background&quot;:&quot;classic&quot;,&quot;stretch_section&quot;:&quot;section-stretched&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-77bbbcf7\" data-id=\"77bbbcf7\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8376646 elementor-widget elementor-widget-spacer\" data-id=\"8376646\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-7f1a35a6 elementor-widget elementor-widget-image\" data-id=\"7f1a35a6\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"300\" height=\"184\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-3-300x184.png\" class=\"attachment-medium size-medium wp-image-64\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-3-300x184.png 300w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-3.png 734w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-13637bca\" data-id=\"13637bca\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-46db7759 elementor-widget elementor-widget-text-editor\" data-id=\"46db7759\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">Gaussian beam is the most commonly used laser beam shape. However, its bell-shaped intensity distribution is not suitable for every application. For example, top-hat beam with a flat intensity is better for scribing, because it avoids damaging the center of grooves.<\/p><p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In this research, we create various beam shapes by the spatial beam shaping technique, and use them for applications such as thin film scribing and multi-photon polymerization. We have shown that Bessel beam can increase depth of focus by orders of magnitude compared to Gaussian beam, greatly easing positioning requirement in processing materials with uneven and curved surface.\u00a0<span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.osapublishing.org%2Fao%2Ffulltext.cfm%3Furi%3Dao-58-13-D91%26id%3D411813&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw2nj_hvGp_Y37XV7WfKDo5t\" target=\"_blank\" rel=\"noopener\">Nanostructures with aspect-ratios exceeding 500:1 have been demonstrated<\/a><\/span>.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-76b8ec9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"76b8ec9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-1854fda\" data-id=\"1854fda\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-8146d5d elementor-widget elementor-widget-heading\" data-id=\"8146d5d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\"> Tailoring Material Response by Temporal Pulse Shaping and Wavelength Tuning<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-439888d elementor-section-height-default elementor-section-boxed elementor-section-height-default\" data-id=\"439888d\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-39cbc433\" data-id=\"39cbc433\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7c8523e elementor-widget elementor-widget-spacer\" data-id=\"7c8523e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-25f30935 elementor-widget elementor-widget-image\" data-id=\"25f30935\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"539\" height=\"249\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-2.png\" class=\"attachment-medium_large size-medium_large wp-image-63\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-2.png 539w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-2-300x139.png 300w\" sizes=\"(max-width: 539px) 100vw, 539px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-6b9e6942\" data-id=\"6b9e6942\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-370217dd elementor-widget elementor-widget-text-editor\" data-id=\"370217dd\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">The complexity of the interaction between ultrashort laser pulse and solid material creates a possibility to modify energy coupling and tailor material response using temporal and spectral techniques. We used a two-color, double-pulse approach to reduce material&#8217;s damage threshold, making it easier to process with low-energy, short-wavelength laser. We are investigating and integrating these techniques, to optimize material processing for better quality, resolution, and productivity.<\/p><p class=\"CDt4Ke zfr3Q\" dir=\"ltr\">In\u00a0<span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.osapublishing.org%2Fol%2Ffulltext.cfm%3Furi%3Dol-45-7-1994%26id%3D429413&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw1YF-y-B7w7zw4elUayC0qz\" target=\"_blank\" rel=\"noopener\">a recent paper<\/a><\/span>, we utilize the excitation of free carriers to achieve feature size below the diffraction limit. In this study, two ultrashort laser pulses are spatially separated by a small amount, and by tuning the timing (delay) between the two pulses, features can be formed in overlapped region with size smaller than that permitted by the diffraction limit.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-4146620 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"4146620\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-fab3d5f\" data-id=\"fab3d5f\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-aa2e4e4 elementor-widget elementor-widget-heading\" data-id=\"aa2e4e4\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Developing New Optical Instrument<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-0bc46d9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0bc46d9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-23525c9\" data-id=\"23525c9\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-490d3eb elementor-widget elementor-widget-image\" data-id=\"490d3eb\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"287\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-1-300x287.png\" class=\"attachment-medium size-medium wp-image-58\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-1-300x287.png 300w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-1.png 448w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-86af81a\" data-id=\"86af81a\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-b085002 elementor-widget elementor-widget-text-editor\" data-id=\"b085002\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>We have developed a\u00a0<span class=\" aw5Odc\"><a class=\"XqQF9c\" href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.osapublishing.org%2Fao%2Ffulltext.cfm%3Furi%3Dao-60-20-5867%26id%3D453093&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw2EvFOjKWP7_8GGEJDy-FGA\" target=\"_blank\" rel=\"noopener\">fourfold Michelson interferometer<\/a><\/span>\u00a0that produces 16 replicas of a single ultrashort laser pulse. We analyzed the timing and amplitude of such &#8220;pulse bursts&#8221; and solved the forward and inverse problem.<\/p><p>\u00a0<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-efd1bf2 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"efd1bf2\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-18b245d\" data-id=\"18b245d\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-e1d8c33 elementor-widget elementor-widget-heading\" data-id=\"e1d8c33\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Few-Optical-Cycle Pulses Generation and Interaction with Materials<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-dd52199 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"dd52199\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-5cfcdd4\" data-id=\"5cfcdd4\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-4e5c108 elementor-widget elementor-widget-image\" data-id=\"4e5c108\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"229\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-300x229.png\" class=\"attachment-medium size-medium wp-image-57\" alt=\"\" srcset=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-300x229.png 300w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image-768x587.png 768w, https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2025\/06\/image.png 827w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-d1fbd48\" data-id=\"d1fbd48\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c64cb0e elementor-widget elementor-widget-text-editor\" data-id=\"c64cb0e\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>A <a href=\"https:\/\/www.google.com\/url?q=https%3A%2F%2Fwww.spiedigitallibrary.org%2Fconference-proceedings-of-spie%2F11514%2F115140P%2F15fs-25fs-tunable-1030nm-laser-source-for-few-cycle-laser%2F10.1117%2F12.2572618.short&amp;sa=D&amp;sntz=1&amp;usg=AOvVaw1wl0K-Uhm2IGORIlqx5i4y\">p<span class=\" aw5Odc\">ulse compressor based on the multi-plate continuum (MPC)<\/span><\/a> design has been constructed. It consists of two compression stages and outputs pulses with 12 fs pulse duration at 1 \u03bcm central wavelength, corresponding to &lt;4 optical cycles. Such few-cycles pulses have been used to study laser damage in semiconductors.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5b2a8a4 elementor-section-stretched elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5b2a8a4\" data-element_type=\"section\" data-e-type=\"section\" data-settings=\"{&quot;stretch_section&quot;:&quot;section-stretched&quot;,&quot;background_background&quot;:&quot;classic&quot;}\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-e36cdd8\" data-id=\"e36cdd8\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-ab2c855 elementor-widget elementor-widget-heading\" data-id=\"ab2c855\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<h3 class=\"elementor-heading-title elementor-size-default\">Modeling and Simulation of Laser Material Processing<\/h3>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<section class=\"elementor-section elementor-inner-section elementor-element elementor-element-0b81d03 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"0b81d03\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-b1bd926\" data-id=\"b1bd926\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-c69597d elementor-widget elementor-widget-image\" data-id=\"c69597d\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img loading=\"lazy\" decoding=\"async\" width=\"300\" height=\"240\" src=\"https:\/\/creol.ucf.edu\/ulp\/wp-content\/uploads\/sites\/42\/2020\/07\/Modeling-Simulation-Laser-Material-Processing-300x240.gif\" class=\"attachment-medium size-medium wp-image-42\" alt=\"Modeling-Simulation-Laser-Material-Processing\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-inner-column elementor-element elementor-element-06b7402\" data-id=\"06b7402\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-71779d8 elementor-widget elementor-widget-text-editor\" data-id=\"71779d8\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<p>The total control of laser material processing requires a better understanding of the processes that take place during and after laser energy deposition. We use modeling and computer simulation to facilitate experimental study. Phenomena of interest include photo-ionization, laser-plasma interaction, and thermal dissipation.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-2686cf9 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"2686cf9\" data-element_type=\"section\" data-e-type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-afea0b1\" data-id=\"afea0b1\" data-element_type=\"column\" data-e-type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t<div class=\"elementor-element elementor-element-abffd38 elementor-widget elementor-widget-spacer\" data-id=\"abffd38\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"spacer.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<div class=\"elementor-spacer\">\n\t\t\t<div class=\"elementor-spacer-inner\"><\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"Two-photon polymerization in strong-pulse regime In two-photo polymerization (TPP), also commonly called multiphoton lithography (MPL), ultrashort laser pulses trigger photo-chemical reaction that forms cross linking of monomer molecules to create polymer. It is common practice to use &#8220;weak&#8221; pulses with pulse energies in nanojoule range due to availability of laser oscillators and detrimental effects such [&hellip;]","protected":false},"author":1,"featured_media":0,"parent":0,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"template-fullscreen.php","meta":{"_acf_changed":false,"footnotes":""},"class_list":["post-19","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/pages\/19","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/comments?post=19"}],"version-history":[{"count":30,"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/pages\/19\/revisions"}],"predecessor-version":[{"id":150,"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/pages\/19\/revisions\/150"}],"wp:attachment":[{"href":"https:\/\/creol.ucf.edu\/ulp\/wp-json\/wp\/v2\/media?parent=19"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}