Directional thermal emission and display using pixelated non-imaging micro-optics.

Autor: Fan Z; Department of Aerospace Engineering, Texas A&M University, College Station, USA.; School of Electronic Science and Technology, Eastern Institute of Technology, Ningbo, China., Hwang T; Department of Materials Science and Engineering, Texas A&M University, College Station, USA., Lin S; Department of Materials Science and Engineering, Texas A&M University, College Station, USA., Chen Y; Department of Materials Science and Engineering, Texas A&M University, College Station, USA., Wong ZJ; Department of Aerospace Engineering, Texas A&M University, College Station, USA. zijing@tamu.edu.; School of Electronic Science and Technology, Eastern Institute of Technology, Ningbo, China. zijing@tamu.edu.; Department of Materials Science and Engineering, Texas A&M University, College Station, USA. zijing@tamu.edu.
Jazyk: angličtina
Zdroj: Nature communications [Nat Commun] 2024 May 28; Vol. 15 (1), pp. 4544. Date of Electronic Publication: 2024 May 28.
DOI: 10.1038/s41467-024-48826-9
Abstrakt: Thermal radiation is intrinsically broadband, incoherent and non-directional. The ability to beam thermal energy preferentially in one direction is not only of fundamental importance, but it will enable high radiative efficiency critical for many thermal sensing, imaging, and energy devices. Over the years, different photonic materials and structures have been designed utilizing resonant and propagating modes to generate directional thermal emission. However, such thermal emission is narrowband and polarised, leading to limited thermal transfer efficiency. Here we experimentally demonstrate ultrabroadband polarisation-independent directional control of thermal radiation with a pixelated directional micro-emitter. Our compact pixelated directional micro-emitter facilitates tunable angular control of thermal radiation through non-imaging optical principles, producing a large emissivity contrast at different view angles. Using this platform, we further create a pixelated infrared display, where information is only observable at certain directions. Our pixelated non-imaging micro-optics approach can enable efficient radiative cooling, infrared spectroscopy, thermophotovoltaics, and thermal camouflaging.
(© 2024. The Author(s).)
Databáze: MEDLINE
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