Ultra-sensitive long-range surface plasmon modes in asymmetric double-electrode waveguide

Ultra-sensitive long-range surface plasmon modes in asymmetric double-electrode waveguide

We present a theoretical study on an index-asymmetric double-electrode waveguide structure and identify a long-range surface plasmon polariton (LRSPP) super-mode for index-sensing. We propose to operate the LRSPP by monitoring its cut-off wavelength which promises ultra-sensitivity. The sensitivity...

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Bibliographic Details
Main Authors: Zhou, Yanyan, Luan, Feng, Yu, Xia, Zhang, Ying
Other Authors: School of Electrical and Electronic Engineering
Format: Conference or Workshop Item
Language:English
Published: 2013
Subjects:
DRNTU::Engineering::Electrical and electronic engineering::Optics, optoelectronics, photonics
Online Access:https://hdl.handle.net/10356/95964
http://hdl.handle.net/10220/10068
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Institution: Nanyang Technological University
Language: English
Description
Summary:We present a theoretical study on an index-asymmetric double-electrode waveguide structure and identify a long-range surface plasmon polariton (LRSPP) super-mode for index-sensing. We propose to operate the LRSPP by monitoring its cut-off wavelength which promises ultra-sensitivity. The sensitivity is calculated to be 6.5×104 nm per refractive index unit (RIU), which is one order magnitude higher than most plasmonic sensors based on spectral interrogation. Additionally, based on computations from the transfer matrix theory, we present the properties of this LRSPP supermode.

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