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Frequency-selective nanostructured plasmonic absorber by highly lossy interface mode

Gong, Yongkang, Li, K., Huang, J., Copner, N. J., Davies, A., Wang, L. and Duan, T. 2012. Frequency-selective nanostructured plasmonic absorber by highly lossy interface mode. Progress In Electromagnetics Research 124 , pp. 511-525. 10.2528/PIER11121903

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We report on an existence of a highly lossy interface mode (HLIM) in a designed plasmonic nanostructure for perfect absorption of the incident optical waves. Interactions between the single thin-metallic-layer ($TML$) and slits arrays for excitation of the HLIM in the proposed plasmonic absorber are investigated, and eigenfrequency formula for the HLIM is derived. Analytical and numerical results show that the HLIM is frequency-selective, opens a narrow and steep absorption band in photonic stopband of the slits arrays. Due to the HLIM lossy characteristic, surface plasmon polaritons are significantly trapped at the TML interface with absorption close to 100%.

Item Type: Article
Date Type: Published Online
Status: Published
Schools: Physics and Astronomy
ISSN: 1559-8985
Date of Acceptance: 2 February 2012
Last Modified: 01 May 2019 13:00

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