Polarimetry analysis and optical contrast of Sb₂S₃ phase change material

Gutiérrez, Yael; Fernández-Pérez, Andrea; Rosales, Saúl A.; Cobianu, Cornel; Gheorghe, Marin; Modreanu, Mircea; Saiz, José M.; Moreno, Fernando; Losurdo, Maria

Polarimetry analysis and optical contrast of Sb₂S₃ phase change material

Files

ome-12-4-1531.pdf(4.42 MB)

Published Version

Date

2022-03-16

Authors

Gutiérrez, Yael

Fernández-Pérez, Andrea

Rosales, Saúl A.

Cobianu, Cornel

Gheorghe, Marin

Modreanu, Mircea

Saiz, José M.

Moreno, Fernando

Losurdo, Maria

Publisher

Optica Publishing Group

Published Version

10.1364/OME.450781

Abstract

Phase-change materials (PCMs) are the cornerstone for the development of reconfigurable and programmable photonic devices. Sb2S3 has been recently proposed as an interesting PCM due to its low-losses in the visible and near-IR. Here, we report the use of imaging polarimetry and spectroscopic ellipsometry to reveal and directly measure the optical properties of Sb2S3 both in crystalline and amorphous states obtained upon crystallization by annealing in air of chemical bath deposited amorphous Sb2S3. The Mueller Matrix polarimetric analysis reveals the strong anisotropy of the Sb2S3 crystallites which crystallize in radial spherulitic domains in contrast to the optical isotropy of the amorphous films. A refractive index contrast of Δn = 0.5 is demonstrated while maintaining low-losses at telecommunications C-band, i.e., λ = 1550 nm.

Keywords

Polarimetry analysis , Phase change material , Sb₂S₃

Citation

Gutiérrez, Y., Fernández-Pérez, A., Rosales, S. A., Cobianu, C., Gheorghe, M., Modreanu, M., Saiz, J. M., Moreno, F. and Losurdo, M. (2022) 'Polarimetry analysis and optical contrast of Sb₂S₃ phase change material', Optical Materials Express, 12(4), pp. 1531-1541. doi: 10.1364/OME.450781