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Interlaboratory study on SbS interplay between structure, dielectric function, and amorphous-to-crystalline phase change for photonics.

Rosales, Saul A
; 
García-Fernández, Pablo
; 
Dicorato, Stefano
; 
Giangregorio, Maria M
; 
Palumbo, Fabio
; 
Ishchenko, Olga
; 
Garry, Guy
; 
Jonuzi, Tigers
; 
Georghe, Marin
; 
Cobianu, Cornel
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Authors
Rosales, Saul A
 García-Fernández, Pablo
 Dicorato, Stefano
 Giangregorio, Maria M
 Palumbo, Fabio
 Ishchenko, Olga
 Garry, Guy
 Jonuzi, Tigers
 Georghe, Marin
 Cobianu, Cornel
 Cobet, Christoph
 Moreno, Fernando
 Pernice, Wolfram H P
 Gutierrez Vela, Yael
 Ovvyan, Anna
 LOSURDO, MARIA
 Santos, Gonzalo
 Dilonardo, Elena
 Junquera, Javier
 Modreanu, Mircea Gabriel
 Resl, Josef
 Hingerl, Kurt
 Juan, Dilson
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Date
10/05/2022
Date Submitted
Keywords
Applied sciences
Materials science
Photonics
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http://hdl.handle.net/10147/641261
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 Δn ∼ 0.4, and 300 ≤ T < 350°C, yielding Type-II crystallization bended spherulitic structure with different dielectric function and optical contrast Δn ∼ 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.
Language
en
Citation
ISSN
eISSN
2589-0042
ISBN
DOI
10.1016/j.isci.2022.104377
PMID
35620425
PMCID
PMC9127585
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