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Proceedings Paper

Unidirectional coupler for surface plasmon polariton using total external reflection of high index material
Author(s): Seong-Woo Cho; Junghyun Park; Byoungho Lee
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Paper Abstract

The surface plasmon polaritons (SPPs) have been researched intensively, the very low coupling efficiency of the SPPs brings about difficulty in practical experiment. We proposed a unidirectional coupler for the SPPs using total external reflection. If the high-index dielectric is located on the left side of the slit, the SPPs toward the left side cannot propagate due to the cut-off property, and they should be totally reflected. By properly designing the structure parameter for constructive interference between the reflected Spp mode and the right-ward propagating SPP mode can happen, resulting in enhancement of the coupling efficiency of the SPPs.

Paper Details

Date Published: 21 August 2009
PDF: 8 pages
Proc. SPIE 7420, Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications III, 74200F (21 August 2009); doi: 10.1117/12.825768
Show Author Affiliations
Seong-Woo Cho, Seoul National Univ. (Korea, Republic of)
Junghyun Park, Seoul National Univ. (Korea, Republic of)
Byoungho Lee, Seoul National Univ. (Korea, Republic of)


Published in SPIE Proceedings Vol. 7420:
Photonic Fiber and Crystal Devices: Advances in Materials and Innovations in Device Applications III
Shizhuo Yin; Ruyan Guo, Editor(s)

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