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17 March 2023 Temperature invariant metasurfaces
Shany Z. Cohen, Sukanta Nandi, Danveer Singh, Tomer Lewi
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Proceedings Volume PC12432, High Contrast Metastructures XII; PC124320X (2023) https://doi.org/10.1117/12.2666134
Event: SPIE OPTO, 2023, San Francisco, California, United States
Abstract
In nanophotonics, temperature variations shift the optical response through the thermo-optic (TO) effect (dn/dT) and may be detrimental in certain applications. We present a comprehensive solution to overcome the problem of optical constants thermal dispersion in nanophotonic and meta-optic devices. By using hybrid meta-atoms composed from two materials with positive and negative TO coefficients, we engineer metasurfaces with zero effective thermal dispersion (dneff/dT≈0). We demonstrate temperature independent resonant frequency, amplitude and phase response in metasurfaces, operating across a broad temperature range (ΔT=500K). Controlling the sign and magnitude of TO dispersion extends the capabilities of light manipulation in nanophotonic systems.
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Shany Z. Cohen, Sukanta Nandi, Danveer Singh, and Tomer Lewi "Temperature invariant metasurfaces", Proc. SPIE PC12432, High Contrast Metastructures XII, PC124320X (17 March 2023); https://doi.org/10.1117/12.2666134
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KEYWORDS
Nanophotonics
Resonators
Temperature metrology
Laser applications
Laser systems engineering
Photodetectors
Sensing systems
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