High sensitivity dark mode plasmonic resonance of gold nanoantennas arrays in evanescent waves

Plasmonic dark modes of gold nanoantennas are observed in evanescent waves. Comparing with the bright mode for normal incidence of nanoantennas, dark mode resonance not only has a higher extinction coefficient but also achieves higher sensitivity to the surrounding environment. The sensitivity of th...

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Bibliographic Details
Main Authors: Kuo-Ping Chen, Yi-Hsun Chen, Yu-Lun Kuo, Zhen-hong Yang, Che-Yuan Chang
Format: Conference Proceeding
Language:English
Subjects:
Bonding
Couplings
Gold
Metamaterials
Plasmons
Sensitivity
Surface waves
Online Access:Request full text
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Description
Summary:Plasmonic dark modes of gold nanoantennas are observed in evanescent waves. Comparing with the bright mode for normal incidence of nanoantennas, dark mode resonance not only has a higher extinction coefficient but also achieves higher sensitivity to the surrounding environment. The sensitivity of the dark mode of gold nanoantenna is 4.84 times that of the bright mode in terms of the figure of merit.
ISSN:2160-8989
2160-9004
DOI:10.1364/CLEO_AT.2015.JTu5A.68