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9 September 2019 Thermal emission by nanoscale transmission line resonators (Conference Presentation)
Bowen Yu, Sheng Shen, Jiayu Li
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Proceedings Volume 11121, New Concepts in Solar and Thermal Radiation Conversion II; 1112108 (2019) https://doi.org/10.1117/12.2529456
Event: SPIE Optical Engineering + Applications, 2019, San Diego, California, United States
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.
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Bowen Yu, Sheng Shen, and Jiayu Li "Thermal emission by nanoscale transmission line resonators (Conference Presentation)", Proc. SPIE 11121, New Concepts in Solar and Thermal Radiation Conversion II, 1112108 (9 September 2019); https://doi.org/10.1117/12.2529456
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KEYWORDS
Resonators
Infrared detection
Infrared imaging
Infrared radiation
Thermography
Electron beam lithography
Fabrication
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