Thermal radiation has diffusive and broad emission characteristics. Controlling emission spectrum and direction is essential for various applications. Nanoparticle arrays, supporting collective lattice resonances, can be employed for controlling optical properties. However, thermal emission characteristics remain unexplored due to the lack of a theoretical model. Here, we develop an analytical model to predict thermal radiation from a nanoparticle array using fluctuation–dissipation theorem and lattice Green's functions. Our findings reveal that the periodicity and particle size of the particle array are main parameters to control both emission spectrum and direction. The derived simple expression for thermal emission enables insightful interpretation of physics. This model will lay a foundation for analytical derivation of thermal radiation from metasurfaces. Our study can be useful in engineering infrared thermal sources and radiative cooling applications.
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12 December 2022
Research Article|
December 14 2022
Theory of thermal radiation from a nanoparticle array
Special Collection:
Thermal Radiation at the Nanoscale and Applications
Hakan Salihoglu
;
Hakan Salihoglu
(Conceptualization, Data curation, Methodology, Writing – original draft)
Department of Mechanical Engineering, Carnegie Mellon University
, Pittsburgh, Pennsylvania 15213, USA
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Zhuo Li
;
Zhuo Li
(Validation, Writing – review & editing)
Department of Mechanical Engineering, Carnegie Mellon University
, Pittsburgh, Pennsylvania 15213, USA
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Sheng Shen
Sheng Shen
a)
(Supervision)
Department of Mechanical Engineering, Carnegie Mellon University
, Pittsburgh, Pennsylvania 15213, USA
a)Author to whom correspondence should be addressed: sshen1@cmu.edu
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a)Author to whom correspondence should be addressed: sshen1@cmu.edu
Note: This paper is part of the APL Special Collection on Thermal Radiation at the Nanoscale and Applications.
Appl. Phys. Lett. 121, 241701 (2022)
Article history
Received:
July 30 2022
Accepted:
December 05 2022
Citation
Hakan Salihoglu, Zhuo Li, Sheng Shen; Theory of thermal radiation from a nanoparticle array. Appl. Phys. Lett. 12 December 2022; 121 (24): 241701. https://doi.org/10.1063/5.0117131
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