Unidirectional Coupling of Surface Plasmon Polaritons by a Single Slit on a Metal Substrate

Unidirectional Coupling of Surface Plasmon Polaritons by a Single Slit on a Metal Substrate

In this letter, a theoretical model is proposed to calculate the coupling efficiency of surface plasmon polaritons (SPPs) by a single slit on the metal film. In contrast to previous work developed for normal incident light only, TM 0 and TM 1 modes of the slit are incorporated in the model, which ma...

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Veröffentlicht in:IEEE photonics technology letters 2016-11, Vol.28 (21), p.2395-2398
Hauptverfasser: Hu, Haifeng, Zeng, Xie, Zhao, Yong, Li, Jin, Song, Haomin, Song, Guofeng, Xu, Yun, Gan, Qiaoqiang
Format: Artikel
Sprache:eng
Schlagworte:
Analytical models
Couplings
Metals
Nanoslit
Optical surface waves
Optical waveguides
plasmonics
Plasmons
Scattering
surface plasmons
unidirectional coupling
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Beschreibung
Zusammenfassung:In this letter, a theoretical model is proposed to calculate the coupling efficiency of surface plasmon polaritons (SPPs) by a single slit on the metal film. In contrast to previous work developed for normal incident light only, TM 0 and TM 1 modes of the slit are incorporated in the model, which makes it applicable for the case of oblique incidence. Numerical simulations confirm that this two-mode model can accurately predict the coupling efficiency of SPPs by slits with subwavelength widths (
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2016.2596782