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4 October 2023 Electrically-controlled switching of a narrowband absorption resonance
Bo K. Shrewsbury, Romil Audhkhasi, Michelle Povinelli
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Proceedings Volume PC12647, Active Photonic Platforms (APP) 2023; PC126471M (2023) https://doi.org/10.1117/12.2675497
Event: SPIE Nanoscience + Engineering, 2023, San Diego, California, United States
Abstract
We have designed an infrared absorber with an electrically switchable narrowband resonance. The absorbers are two identical, coupled, metal-semiconductor-metal resonators that support a dark supermode. The semiconductor layer of the resonators is gallium arsenide, which has a refractive index shift under applied voltage. Electrically tuning one of the coupled resonators breaks the symmetry of the system and allows the dark supermode to couple to an incoming plane wave, producing a narrowband absorption resonance. Our designed absorber is predicted to achieve an absorption modulation of 97% when switching from 0V to 1.65V.
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Bo K. Shrewsbury, Romil Audhkhasi, and Michelle Povinelli "Electrically-controlled switching of a narrowband absorption resonance", Proc. SPIE PC12647, Active Photonic Platforms (APP) 2023, PC126471M (4 October 2023); https://doi.org/10.1117/12.2675497
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KEYWORDS
Absorption
Switching
Resonators
Refractive index
Gallium arsenide
Modulation
Plane waves
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