Abstract

We propose a plasmonic nanosensor based on Fano resonance in the strong-confinement metal–dielectric–metal waveguide side-coupled with a pair of nanoresonators. Due to the coherent interference of the splitting discrete and quasi-continuum modes, the reflection spectrum possesses a sharp asymmetric Fano resonance dip, which is dependent on the cavity–cavity phase and the refractive index change of the dielectric. The physical features contribute to a highly efficient plasmonic sensor for refractive index sensing. The nanosensor yields a sensitivity of 900nm/RIU and a figure of merit of 500, remarkable values compared with those of plasmonic sensors supported by perfect absorbers.

© 2012 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Sensing analysis based on plasmon induced transparency in nanocavity-coupled waveguide

Shiping Zhan, Hongjian Li, Zhihui He, Boxun Li, Zhiquan Chen, and Hui Xu
Opt. Express 23(16) 20313-20320 (2015)

Theoretical analysis of ultrahigh figure of merit sensing in plasmonic waveguides with a multimode stub

Zhihui He, Hongjian Li, Boxun Li, Zhiquan Chen, Hui Xu, and Mingfei Zheng
Opt. Lett. 41(22) 5206-5209 (2016)

Theoretical analysis and applications in inverse T-shape structure

Boxun Li, Hongjian Li, Lili Zeng, Shiping Zhan, Zhihui He, Zhiquan Chen, and Hui Xu
J. Opt. Soc. Am. A 33(5) 811-816 (2016)

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Supplementary Material (2)

» Media 1: MOV (280 KB)     
» Media 2: MOV (190 KB)     

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Figures (4)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Equations (7)

You do not have subscription access to this journal. Equations are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription

Metrics

You do not have subscription access to this journal. Article level metrics are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access OSA Member Subscription