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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
Tunable optical anisotropy in epitaxial phase-change VO2thin films
Nanophotonics, Volume 11, No. 17, Year 2022
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Description
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. © 2022 the author(s), published by De Gruyter, Berlin/Boston.
Authors & Co-Authors
Slassi, Amine
Italy, Rome
Consiglio Nazionale Delle Ricerche
Sun, Yifei
United States, West Lafayette
Purdue University
Pénuelas, José
France, Lyon
Université de Lyon
Orobtchouk, Régis
France, Lyon
Université de Lyon
Calzolari, Arrigo
Italy, Rome
Consiglio Nazionale Delle Ricerche
Statistics
Citations: 5
Authors: 5
Affiliations: 4
Identifiers
Doi:
10.1515/nanoph-2022-0153
ISSN:
21928614