Interlaboratory study on Sb2S3 interplay between structure, dielectric function, and amorphous-to-crystalline phase change for photonics
Yael Gutiérrez,
Anna P. Ovvyan,
Gonzalo Santos,
Dilson Juan,
Saul A. Rosales,
Javier Junquera,
Pablo García-Fernández,
Stefano Dicorato,
Maria M. Giangregorio,
Elena Dilonardo,
Fabio Palumbo,
Mircea Modreanu,
Josef Resl,
Olga Ishchenko,
Guy Garry,
Tigers Jonuzi,
Marin Georghe,
Cornel Cobianu,
Kurt Hingerl,
Christoph Cobet,
Fernando Moreno,
Wolfram H.P. Pernice,
Maria Losurdo
Affiliations
Yael Gutiérrez
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy
Anna P. Ovvyan
Institute of Physics, University of Münster, Heisenbergstraße 11, 48149 Münster, Germany
Gonzalo Santos
Departmento de Física Aplicada, Universidad de Cantabria, Avda. Los Castros S/n, 39005 Santander, Spain
Dilson Juan
Departmento de Física Aplicada, Universidad de Cantabria, Avda. Los Castros S/n, 39005 Santander, Spain
Saul A. Rosales
Departmento de Física Aplicada, Universidad de Cantabria, Avda. Los Castros S/n, 39005 Santander, Spain
Javier Junquera
Departamento de Ciencias de La Tierra y Física de La Materia Condensada, Universidad de Cantabria, Cantabria Campus Internacional, Avda. de Los Castros S/n, 39005 Santander, Spain
Pablo García-Fernández
Departamento de Ciencias de La Tierra y Física de La Materia Condensada, Universidad de Cantabria, Cantabria Campus Internacional, Avda. de Los Castros S/n, 39005 Santander, Spain
Stefano Dicorato
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy
Maria M. Giangregorio
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy
Elena Dilonardo
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy
Fabio Palumbo
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy
Mircea Modreanu
Tyndall National Institute-University College Cork, Lee Maltings, Dyke Parade, Cork T12 R5CP, Ireland
Josef Resl
Center for Surface and Nanoanalytics, Johannes Kepler University, 4040 Linz, Austria
Olga Ishchenko
TE-OX, 21 Rue Jean Rostand, 91400 Orsay, France
Guy Garry
TE-OX, 21 Rue Jean Rostand, 91400 Orsay, France
Tigers Jonuzi
VLC Photonics S.L. Universidad Politécnica de Valencia (access I) Camino de Vera S/n - 46022Valencia, Spain
Marin Georghe
NANOM MEMS Srl, G. Cosbuc 9, 505400 Rasnov, Brasov, Romania
Cornel Cobianu
NANOM MEMS Srl, G. Cosbuc 9, 505400 Rasnov, Brasov, Romania
Kurt Hingerl
Center for Surface and Nanoanalytics, Johannes Kepler University, 4040 Linz, Austria
Christoph Cobet
Center for Surface and Nanoanalytics, Johannes Kepler University, 4040 Linz, Austria
Fernando Moreno
Departmento de Física Aplicada, Universidad de Cantabria, Avda. Los Castros S/n, 39005 Santander, Spain
Wolfram H.P. Pernice
Institute of Physics, University of Münster, Heisenbergstraße 11, 48149 Münster, Germany; Heidelberg University, Kirchhoff-Institute for Physics, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany
Maria Losurdo
CNR ICMATE, Corso Stati Uniti 4, I-35127, Padova, Italy; Corresponding author
Summary: 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.
