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Infrared emission of a freestanding plasmonic membrane

TitleInfrared emission of a freestanding plasmonic membrane
Publication TypeJournal Article
Year of Publication2018
AuthorsMonshat, H, Liu, LJ, McClelland, J, Biswas, R, Lu, M
JournalApplied Physics Letters
Date Published01
Type of ArticleArticle
ISBN Number0003-6951
Accession NumberWOS:000423027300004
Keywordsband, films, photonic-crystal, physics, thermal emission, transmission

This paper reports a free-standing plasmonic membrane as a thermal emitter in the near-and midinfrared regions. The plasmonic membrane consists of an ultrathin gold film perforated with a two-dimensional array of holes. The device was fabricated using an imprint and transfer process and fixed on a low-emissivity metal grid. The thermal radiation characteristics of the plasmonic membrane can be engineered by controlling the array period and the thickness of the gold membrane. Plasmonic membranes with two different periods were designed using electromagnetic simulation and then characterized for their transmission and infrared radiation properties. The free-standing membranes exhibit extraordinary optical transmissions with the resonant transmission coefficient as high as 76.8%. After integration with a customized heater, the membranes demonstrate narrowband thermal emission in the wavelength range of 2.5 mu m to 5.5 mu m. The emission signatures, including peak emission wavelength and bandwidth, are associated with the membrane geometry. The ultrathin membrane infrared emitter can be adopted in applications, such as chemical analysis and thermal imaging. Published by AIP Publishing.

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