Hybrid graphene-dielectric-metal nanostructure for electrostatically tunable daytime radiative cooling

Jayden Craft; Richard M. Osgood III; Michael N. Leuenberger

doi:10.1117/12.2686888

4 October 2023 Hybrid graphene-dielectric-metal nanostructure for electrostatically tunable daytime radiative cooling

Jayden Craft, Richard M. Osgood III, Michael N. Leuenberger

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Proceedings Volume PC12746, SPIE-CLP Conference on Advanced Photonics 2023; PC127460A (2023) https://doi.org/10.1117/12.2686888
Event: SPIE-CLP Conference on Advanced Photonics, 2023, San Diego, California, United States

Abstract

Using finite-difference time domain (FDTD) calculations we show that hybrid graphene-dielectric-metal nanostructures can achieve daytime radiative cooling. While a metal back mirror reflects solar light, metal nanoparticles on the dielectric-graphene heterostructure host acoustic graphene plasmons that allow for electrostatic tuning of their resonance wavelengths; in particular, the resonance wavelengths can be tuned to overlap in the mid-infrared (mid-IR) with the atmospherically transparent windows between 3 um and 5 um and also between 8 um and 12 um, thereby achieving net radiative cooling at ambient temperatures. M.N.L. achknowledges support by the ORISE fellowship 2022/2023.

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Jayden Craft, Richard M. Osgood III, and Michael N. Leuenberger "Hybrid graphene-dielectric-metal nanostructure for electrostatically tunable daytime radiative cooling", Proc. SPIE PC12746, SPIE-CLP Conference on Advanced Photonics 2023, PC127460A (4 October 2023); https://doi.org/10.1117/12.2686888

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KEYWORDS

Graphene

Nanostructures

Gold

Heterojunctions

Emission wavelengths

Plasmons

Acoustics

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