High-Sensitivity Sensing Based on Plasmon-Induced Transparency

Author

Li, B.X. ; Li, H.J. ; Zeng, L.L. ; Zhan, S.P. ; He, Z.H. ; Chen, Z.Q. ; Xu, H.

Author_Institution

Coll. of Phys. & Electron., Central South Univ., Changsha, China

Volume

7

Issue

5

fYear

2015

Firstpage

1

Lastpage

7

Abstract

High-sensitivity sensing based on plasmon-induced transparency (PIT) in a rectangular resonator has been investigated in detail. Multimode theory is introduced to explain the redshift and blueshift of the transmission spectrum by adjusting a structural parameter (w or h). In sensing applications, the sensitivity of the proposed structure is about 800 nm/RIU, and its figure of merit (FOM) is as high as 17280. In addition, the influences of structural parameters on FOM are researched in detail. The results indicate that structural parameters play important roles in optimizing the sensing performance, and the length (h) is more sensitive than the width (w) for FOM. The plasmonic configuration has the advantages of easy fabrication and compactness, which may find important applications in highly integrated optics devices, optical communication, and sensitive nanometer-scale refractive index sensors.

Keywords

optical resonators; optical sensors; red shift; self-induced transparency; blueshift; high-sensitivity sensing; multimode theory; plasmon-induced transparency; plasmonic configuration; rectangular resonator; redshift; structural parameter; transmission spectrum; Optical resonators; Optical sensors; Optical waveguides; Plasmons; Refractive index; Sensitivity; High sensitivity sensing; High-sensitivity sensing; PIT; Plasmonics; Waveguide; plasmon-induced transparency (PIT); plasmonics; waveguide;

fLanguage

English

Journal_Title

Photonics Journal, IEEE

Publisher

ieee

ISSN

1943-0655

Type

jour

DOI

10.1109/JPHOT.2015.2483202

Filename

7286720