Angle-independent infrared filter assisted by localized surface plasmon polariton

C. M. Wang, Y. C. Chang, M. W. Tsai, Y. H. Ye, C. Y. Chen, Y. W. Jiang, S. C. Lee, D. P. Tsai

研究成果: 雜誌貢獻期刊論文同行評審

33 引文 斯高帕斯(Scopus)

摘要

A plasmonic infrared (IR) filter was experimentally and theoretically investigated. A localized surface plasmon polariton (LSPP) mode which was angle-independent in almost fully incident angle was observed. Through the use of the LSPP mode, an IR reflection-type notch filter with an ultrahigh immunity for the angular deviation was realized. An angle-independent reflection dip was designed at λ = 6.2 μm with a full-width at half-maximum of 0.5 μm. The experimental result shows that the position and the line shape of the resonant dip at λ = 6.2 μm remain the same for an increasing incident angle from 20° to 60°. The optical properties can be engineered by tuning thickness of the cavity layer. The proposed notch filter presents a large angular tolerance means that the superior angular stability makes it more feasible as it is put into practical applications.

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頁(從 - 到)1103-1105
頁數3
期刊IEEE Photonics Technology Letters
20
發行號13
DOIs
出版狀態已出版 - 1 7月 2008

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