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Proceedings Paper

Thermal emission by nanoscale transmission line resonators (Conference Presentation)

Paper Abstract

Thermal radiation with a narrow-band emission spectrum is of great significance in various applications such as infrared sensing, thermophotovoltaics, radiation cooling, and thermal circuits. Although resonant nanophotonic structures such as metamaterials and nanocavities have been demonstrated to achieve the narrow-band thermal emission, tuning their radiation power toward perfect emission still remains challenging. Here, based on the recently developed quasi-normal mode theory, we prove that thermal emission from nanoscale transmission line resonators can always be controlled by tuning the size and geometry of single resonator and the density of the resonator array. By use of nanoscale transmission line resonators as basic building blocks, we experimentally demonstrate a new type of macroscopic perfect and tunable thermal emitters. The transmission line resonator arrays are fabricated by standard E-beam lithography techniques and subsequent lift-off process. The emissivity of the samples is measured by using a FTIR spectrometer combined with an infrared microscope. Our experimental demonstration in conjunction with the general theoretical framework lays the foundation for designing tunable narrowband thermal emitters with applications in thermal infrared light sources, thermal management, and infrared sensing and imaging.

Paper Details

Date Published: 9 September 2019
Proc. SPIE 11121, New Concepts in Solar and Thermal Radiation Conversion II, 1112108 (9 September 2019); doi: 10.1117/12.2529456
Show Author Affiliations
Bowen Yu, Carnegie Mellon Univ. (United States)
Sheng Shen, Carnegie Mellon Univ. (United States)
Jiayu Li, Carnegie Mellon Univ. (United States)

Published in SPIE Proceedings Vol. 11121:
New Concepts in Solar and Thermal Radiation Conversion II
Jeremy N. Munday; Peter Bermel, Editor(s)

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