Tunable optical anisotropy in epitaxial phase-change VO<sub>2</sub> thin films-Reference-Cited by-同舟云学术

Tunable optical anisotropy in epitaxial phase-change VO₂ thin films

Published:2022-06-01 Issue:17 Volume:11 Page:3913-3922
ISSN:2192-8614
Container-title:Nanophotonics
language:en
Short-container-title:

Author:

John Jimmy¹,Slassi Amine²,Sun Jianing³,Sun Yifei⁴,Bachelet Romain¹,Pénuelas José¹,Saint-Girons Guillaume¹,Orobtchouk Régis¹,Ramanathan Shriram⁴,Calzolari Arrigo²,Cueff Sébastien¹^ORCID

Affiliation:

1. Université de Lyon, Institut des Nanotechnologies de Lyon (INL) UMR 5270 CNRS, École Centrale de Lyon , 36 Avenue Guy de Collongue , Ecully 69134 , France

2. CNR-NANO Istituto Nanoscienze , Modena I-41125 , Italy

3. J. A. Woollam, Co. , 645 M Street, Suite 102 , Lincoln 68508 , NE , USA

4. School of Materials Engineering, Purdue University , West Lafayette 47907 , IN , USA

Abstract

Abstract We theoretically and experimentally demonstrate a strong and tunable optical anisotropy in epitaxially-grown VO2 thin films. Using a combination of temperature-dependent X-ray diffraction, spectroscopic ellipsometry measurements and first-principle calculations, we reveal that these VO2 thin films present an ultra-large birefringence (Δn > 0.9). Furthermore, leveraging the insulator-to-metal transition of VO2, we demonstrate a dynamic reconfiguration of optical properties from birefringent to hyperbolic, which are two distinctive regimes of anisotropy. Such a naturally birefringent and dynamically switchable platform paves the way for multi-functional devices exploiting tunable anisotropy and hyperbolic dispersion.

Publisher

Walter de Gruyter GmbH

Subject

Electrical and Electronic Engineering,Atomic and Molecular Physics, and Optics,Electronic, Optical and Magnetic Materials,Biotechnology

Link

https://www.degruyter.com/document/doi/10.1515/nanoph-2022-0153/pdf

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