@article{10902/28088,
year = {2022},
month = {6},
url = {https://hdl.handle.net/10902/28088},
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.},
organization = {The authors acknowledge the support from the European Union’s Horizon 2020 research and innovation program (No 899598 - PHEMTRONICS).},
publisher = {Elsevier},
publisher = {iScience, 2022, 25(6), 104377},
title = {Interlaboratory study on Sb2S3 interplay between structure, dielectric function, and morphous-to-crystalline phase change for photonics},
author = {Gutiérrez, Yael and Ovvyan, Anna P. and Santos Perodia, Gonzalo and Rosales Mendoza, Saúl Antonio and Junquera Quintana, Francisco Javier and García Fernández, Pablo (físico) and Dicorato, Stefano and Giangregorio, Maria M. and Dilonardo, Elena and Palumbo, Fabio and Modreanu, Mircea and Resl, Josef and Ishchenko, Olga and Garry, Guy and Jonuzi, Tigers and Georghe, Marin and Cobianu, Cornel and Moreno Gracia, Fernando and Juan, Dilson},
}