Investigation of the optical performance in straight hybrid plasmonic waveguides with concentric nanoring and nanodisk

Xing Chen; Lingling Wang; Xiang Zhai; Yuanjiang Xiang; Han Zhang

doi:10.1117/1.JNP.9.093095

22 January 2015 Investigation of the optical performance in straight hybrid plasmonic waveguides with concentric nanoring and nanodisk

Xing Chen, Lingling Wang, Xiang Zhai, Yuanjiang Xiang, Han Zhang

Author Affiliations +

Journal of Nanophotonics, Vol. 9, Issue 1, 093095 (January 2015). https://doi.org/10.1117/1.JNP.9.093095

Abstract

A straight hybrid plasmonic waveguide (HPW) with concentric nanoring and nanodisk is numerically investigated based on a three-dimensional finite-difference time-domain method. It shows that the straight HPW and the nanoring with variational geometry parameters possess different coupling efficiencies at the telecommunication wavelengths. With different coupling processes, effective coupling can be achieved which provides a way to achieve optimal transmittance. Under an appropriate geometry parameter regime, the HPW could simultaneously offer a large split ratio and provide subwavelength field confinement and long propagation distance. The wavelength responses show that the HPW has good wavelength toleration around 1550 nm, indicating that it may be employed as an optical device with the desired performance for optical communications.

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Xing Chen, Lingling Wang, Xiang Zhai, Yuanjiang Xiang, and Han Zhang "Investigation of the optical performance in straight hybrid plasmonic waveguides with concentric nanoring and nanodisk," Journal of Nanophotonics 9(1), 093095 (22 January 2015). https://doi.org/10.1117/1.JNP.9.093095

Published: 22 January 2015

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KEYWORDS

Metals

Waveguides

Plasmonic waveguides

Finite-difference time-domain method

Photonic integrated circuits

Silicon

Wave propagation

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