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Interlaboratory study on Sb2S3 interplay between structure, dielectric function, and morphous-to-crystalline phase change for photonics

Abstract: Antimony sulfide, Sb2S3, is interesting as the phase-change material for applications requiring high transmission from the visible to telecom wavelengths, with its band gap tunable from 2.2 to 1.6 eV, depending on the amorphous and crystalline phase. Here we present results from an interlaboratory study on the interplay between the structural change and resulting optical contrast during the amorphous-to-crystalline transformation triggered both thermally and optically. By statistical analysis of Raman and ellipsometric spectroscopic data, we have identified two regimes of crystallization, namely 250_C % T < 300_C, resulting in Type-I spherulitic crystallization yielding an optical contrast Dn _ 0.4, and 300 % T < 350 _ C, yielding Type-II crystallization bended spherulitic structure with different dielectric function and optical contrast Dn _ 0.2 below 1.5 eV. Based on our findings, applications of on-chip reconfigurable nanophotonic phase modulators and of a reconfigurable high-refractive-index core/phase-change shell nanoantenna are designed and proposed.

 Autoría: Gutiérrez Y., Ovvyan A.P., Santos G., Juan D., Rosales S.A., Junquera J., García-Fernández P., Dicorato S., Giangregorio M.M., Dilonardo E., Palumbo F., Modreanu M., Resl J., Ishchenko O., Garry G., Jonuzi T., Georghe M., Cobianu C., Hingerl K., Cobet C., Moreno F., Pernice W.H.P., Losurdo M.,

 Fuente: iScience, 2022, 25(6), 104377

 Editorial: Elsevier

 Fecha de publicación: 17/06/2022

 Nº de páginas: 27

 Tipo de publicación: Artículo de Revista

 DOI: 10.1016/j.isci.2022.104377

 ISSN: 2589-0042

 Proyecto europeo: info:eu-repo/grantAgreement/EC/H2020/ 899598/eu/Active Optical Phase-Change Plasmonic Transdimensional Systems Enabling Femtojoule and Femtosecond Extreme Broadband Adaptive Reconfigurable Devices/PHEMTRONICS/

 Url de la publicación: https://doi.org/10.1016/j.isci.2022.104377

Autoría

OVVYAN, ANNA P.

GONZALO SANTOS PERODIA

DILSON JUAN

DICORATO, STEFANO

GIANGREGORIO, MARIA M.

DILONARDO, ELENA

PALUMBO, FABIO

MODREANU, MIRCEA

RESL, JOSEF

ISHCHENKO, OLGA

GARRY, GUY

JONUZI, TIGERS

GEORGHE, MARIN

COBIANU, CORNEL