{"id":779,"date":"2022-11-28T18:59:45","date_gmt":"2022-11-28T23:59:45","guid":{"rendered":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/?p=779"},"modified":"2022-11-28T18:59:45","modified_gmt":"2022-11-28T23:59:45","slug":"congratulations-to-ryan-kowalski-for-the-vinse-spotlight-publication","status":"publish","type":"post","link":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/2022\/11\/congratulations-to-ryan-kowalski-for-the-vinse-spotlight-publication\/","title":{"rendered":"Congratulations to Ryan Kowalski for the VINSE spotlight publication!"},"content":{"rendered":"<p>\u201cMid- to Far-Infrared Anisotropic Dielectric Function of HfS<sub>2<\/sub>\u00a0and HfSe<sub>2<\/sub>\u201d published in Advanced Optical Materials, selected as a VINSE Spotlight Publication.<\/p>\n<p>&nbsp;<\/p>\n<p>About the author: Ryan Kowalski is a fourth-year graduate student pursuing a PhD in Interdisciplinary Materials Science under the direction Dr. Josh Caldwell. Using infrared spectroscopy, the Caldwell group investigates the optical properties of semiconductor materials for optoelectronic devices. Ryan&#8217;s recent publication in\u00a0<i>Advanced Optical Materials<\/i>\u00a0characterizes the anisotropic dielectric functions of 2D van der Waals materials, HfS<sub>2<\/sub>\u00a0and HfSe<sub>2<\/sub>\u00a0. The crystal anisotropy of these polar dielectric materials gives rise to a spectral region, the Reststrahlen band, that can host light-matter quasiparticles called surface phonon polaritons (SPhPs). SPhPs allow for extreme confinement of light beyond the diffraction limit, an essential component for nanophotonic devices. Furthermore, it is found that HfS\u00ad<sub>2<\/sub>\u00a0and HfSe<sub>2<\/sub>\u00a0have extremely large Reststrahlen bands that span most of the far-infrared, a region of the electromagnetic spectrum that has traditionally been restricted due to materials constraints. This work paves the way for a potentially new class of optical infrastructure in the far-infrared.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-780\" src=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2532\/2022\/11\/VINSE.png\" alt=\"VINSE\" width=\"462\" height=\"151\" srcset=\"https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2532\/2022\/11\/VINSE.png 462w, https:\/\/cdn.vanderbilt.edu\/t2-my\/my-prd\/wp-content\/uploads\/sites\/2532\/2022\/11\/VINSE-300x98.png 300w\" sizes=\"auto, (max-width: 462px) 100vw, 462px\" \/><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u201cMid- to Far-Infrared Anisotropic Dielectric Function of HfS2\u00a0and HfSe2\u201d published in Advanced Optical Materials, selected as a VINSE Spotlight Publication. &nbsp; About the author: Ryan Kowalski is a fourth-year graduate student pursuing a PhD in Interdisciplinary Materials Science under the direction Dr. Josh Caldwell. Using infrared spectroscopy, the Caldwell group investigates the optical properties of&#8230;<\/p>\n","protected":false},"author":9195,"featured_media":780,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-779","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"_links":{"self":[{"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/posts\/779","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/users\/9195"}],"replies":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/comments?post=779"}],"version-history":[{"count":1,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/posts\/779\/revisions"}],"predecessor-version":[{"id":781,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/posts\/779\/revisions\/781"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/media\/780"}],"wp:attachment":[{"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/media?parent=779"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/categories?post=779"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/my.vanderbilt.edu\/caldwellgroup\/wp-json\/wp\/v2\/tags?post=779"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}