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Proceedings Paper

Unidirectional reflectionless propagation and slow-light enhanced sensing with plasmonic waveguide-cavity systems
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Paper Abstract

We design a non-parity-time-symmetric plasmonic waveguide-cavity system, consisting of two metal-dielectric-metal stub resonators side coupled to a metal-dielectric-metal waveguide, to form an exceptional point, and realize unidirectional reflectionless propagation at the optical communication wavelength. We also show that slow-light-enhanced ultra-compact plasmonic Mach-Zehnder interferometer sensors, in which the sensing arm consists of a waveguide system based on a plasmonic analogue of electromagnetically induced transparency, lead to an order of magnitude enhancement in the refractive index sensitivity compared to a conventional metal-dielectric-metal plasmonic waveguide sensor. Finally, we show that plasmonic coaxial waveguides offer a platform for practical implementation of plasmonic waveguide-cavity systems.

Paper Details

Date Published: 16 September 2016
PDF: 6 pages
Proc. SPIE 9920, Active Photonic Materials VIII, 99201Y (16 September 2016); doi: 10.1117/12.2238232
Show Author Affiliations
G. Veronis, Louisiana State Univ. (United States)
Y. Huang, Central South Univ. (China)
A. Mahigir, Louisiana State Univ. (United States)
P. Dastmalchi, Louisiana State Univ. (United States)
W. Shin, Stanford Univ. (United States)
C. Min, Shenzhen Univ. (China)
S. Fan, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 9920:
Active Photonic Materials VIII
Ganapathi S. Subramania; Stavroula Foteinopoulou, Editor(s)

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