Frequency-selective nanostructured plasmonic absorber by highly lossy interface mode

Y. Gong*, K. Li, J. Huang, N. J. Copner, A. Davies, L. Wang, T. Duan

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

4 Citations (SciVal)

Abstract

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%.

Original languageEnglish
Pages (from-to)511-525
Number of pages15
JournalProgress In Electromagnetics Research
Volume124
DOIs
Publication statusPublished - 2012
Externally publishedYes

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