Controlling light polarization with VO2 films

Tran Vinh Son; Alain Haché

doi:10.1117/12.2646195

31 January 2023 Controlling light polarization with VO₂ films

Tran Vinh Son, Alain Haché

Proceedings Volume 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022; 1247707 (2023) https://doi.org/10.1117/12.2646195
Event: International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors, 2022, Boston, Massachusetts, United States

Abstract

Complex-valued refractive indices generally impart unequal optical phase shifts to s and p light polarization components. In a phase-change materials, such as vanadium dioxide (VO2), this effect can be exploited for optical modulation applications in thin films. Adding to this relative phase shift, VO2 exhibits large refractive index changes during the phase transition, which is useful to modulate polarization. In this paper, we review our recent progress on polarization modulation of visible and infrared light interacting with VO2 films. Aspects to be discussed include the best conditions for phase and amplitude modulation, and enhancement by metallic underlayers. Thermal hysteresis of the refractive index and its effect on polarization states during the phase transition will be also discussed.

Citation Download Citation

Tran Vinh Son and Alain Haché "Controlling light polarization with VO₂ films", Proc. SPIE 12477, International Workshop on Thin Films for Electronics, Electro-Optics, Energy and Sensors 2022, 1247707 (31 January 2023); https://doi.org/10.1117/12.2646195

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