Surface plasmon-assisted transmission in dual metallic film

Xiumin Xie; Weiying Hu; Qiang Xu; Shuai Huang; Jian Chen; Qian Dai; Zhu Shi; Libo Yu; Zhiming M. Wang; Qiang Zhou; Hai-Zhi Song

doi:10.1117/12.2502768

5 November 2018 Surface plasmon-assisted transmission in dual metallic film

Xiumin Xie, Weiying Hu, Qiang Xu, Shuai Huang, Jian Chen, Qian Dai, Zhu Shi, Libo Yu, Zhiming M. Wang, Qiang Zhou, Hai-Zhi Song

Author Affiliations +

Proceedings Volume 10815, Optical Design and Testing VIII; 1081507 (2018) https://doi.org/10.1117/12.2502768
Event: SPIE/COS Photonics Asia, 2018, Beijing, China

Abstract

Transmission properties of transverse magnetic light through periodic sub-wavelength slit apertures on a metallic film, behind which is another planar metallic film, are studied by finite-difference-time-domain method with constant periodicity and slit width. The result shows that the transmitted energy is strongly correlated to both the thickness of the metallic grating and the distance between such two films at a specific wavelength. The thickness of the grating acts as a filter that allows specific wavelengths to go through the slits, while the distance of dual metallic film dominantly determines a constructive or destructive interference between the transmitted light through the slits and the reflected wave from the back film. Besides, a strong vibration in the transmission spectrum as a function of the grating thickness is interestingly observed, which can be interpreted by the resonance of the surface plasmons of the front and the back metallic films.

Citation Download Citation

Xiumin Xie, Weiying Hu, Qiang Xu, Shuai Huang, Jian Chen, Qian Dai, Zhu Shi, Libo Yu, Zhiming M. Wang, Qiang Zhou, and Hai-Zhi Song "Surface plasmon-assisted transmission in dual metallic film", Proc. SPIE 10815, Optical Design and Testing VIII, 1081507 (5 November 2018); https://doi.org/10.1117/12.2502768

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