Polarization-independent VO2 metagrating for broadband optical transmittance modulation

Kyuho Kim; Taewon Choi; Sun-Je Kim; Yoonchan Jeong; Byoungho Lee

doi:10.1117/12.2650121

15 March 2023 Polarization-independent VO₂ metagrating for broadband optical transmittance modulation

Kyuho Kim, Taewon Choi, Sun-Je Kim, Yoonchan Jeong, Byoungho Lee

Proceedings Volume 12431, Photonic and Phononic Properties of Engineered Nanostructures XIII; 124310G (2023) https://doi.org/10.1117/12.2650121
Event: SPIE OPTO, 2023, San Francisco, California, United States

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Abstract

In general, the function of a passive nanophotonic device cannot be varied once its geometric and refractive index parameters are fixed. Thus, research on tunable optical nanostructures has been attracting much attention, and phasechange materials, whose optical properties can be actively controlled by thermal stimulus, have widely been utilized and integrated with nanophotonic devices. In this work, we propose a novel optimized design of an active metagrating transmission modulator composed of crossed ridge waveguides made of a VO₂ film. The proposed device can provide not only near-unity modulation depth of the 0^th order transmittance, but also polarization-independent operation with high efficiency and a broad bandwidth in the telecom wavelength region.

Citation Download Citation

Kyuho Kim, Taewon Choi, Sun-Je Kim, Yoonchan Jeong, and Byoungho Lee "Polarization-independent VO₂ metagrating for broadband optical transmittance modulation", Proc. SPIE 12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, 124310G (15 March 2023); https://doi.org/10.1117/12.2650121

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