Ultralow Dispersion Multicomponent Thin-Film Chalcogenide Glass for Broadband Gradient-Index Optics

Bibliographische Detailangaben
Veröffentlicht in:	Advanced materials (Deerfield Beach, Fla.). - 1998. - 30(2018), 39 vom: 18. Sept., Seite e1803628
1. Verfasser:	Kang, Myungkoo (VerfasserIn)
Weitere Verfasser:	Swisher, Andrew M, Pogrebnyakov, Alexej V, Liu, Liu, Kirk, Andrew, Aiken, Stephen, Sisken, Laura, Lonergan, Charmayne, Cook, Justin, Malendevych, Teodor, Kompan, Fedor, Divliansky, Ivan, Glebov, Leonid B, Richardson, Martin C, Rivero-Baleine, Clara, Pantano, Carlo G, Mayer, Theresa S, Richardson, Kathleen
Format:	Online-Aufsatz
Sprache:	English
Veröffentlicht:	2018
Zugriff auf das übergeordnete Werk:	Advanced materials (Deerfield Beach, Fla.)
Schlagworte:	Journal Article achromatic microlenses chalcogenide glass gradient refractive index optical nanocomposites photothermal process

Beschreibung
Zusammenfassung:	© 2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim. A novel photothermal process to spatially modulate the concentration of sub-wavelength, high-index nanocrystals in a multicomponent Ge-As-Pb-Se chalcogenide glass thin film resulting in an optically functional infrared grating is demonstrated. The process results in the formation of an optical nanocomposite possessing ultralow dispersion over unprecedented bandwidth. The spatially tailored index and dispersion modification enables creation of arbitrary refractive index gradients. Sub-bandgap laser exposure generates a Pb-rich amorphous phase transforming on heat treatment to high-index crystal phases. Spatially varying nanocrystal density is controlled by laser dose and is correlated to index change, yielding local index modification to ≈+0.1 in the mid-infrared
Beschreibung:	Date Completed 27.09.2018 Date Revised 01.10.2020 published: Print-Electronic Citation Status PubMed-not-MEDLINE
ISSN:	1521-4095
DOI:	10.1002/adma.201803628