The improvement of figure of merit with infrared perfect absorber for plasmonic resonance sensing

Author

Li, G.H. ; Wu, X. ; Jiang, Y. ; Shao, C.X. ; Huang, L.J. ; Chen, X.S. ; Hu, W.D. ; Lu, W.

Author_Institution

Nat. Lab. for Infrared Phys., Shanghai Inst. of Tech. Phys., Shanghai, China

fYear

2012

fDate

28-31 Aug. 2012

Firstpage

3

Lastpage

4

Abstract

We present an infrared perfect absorber which combines gold nanobars and a photonic microcavity. By adjusting the structural geometry, this device is utilized for refractive index sensing. For proper designed structural parameters, it can yield more than 99% absorbance in the near-infrared frequency regime. Our work directly investigate the effect of geometry on sensing performance and it can sever as a model of coupling between localized surface plasmon within nanoparticles and propagating surface plasmon along planar metal layer for sensing applications with a perfect absorber.

Keywords

gold; light absorption; nanophotonics; nanostructured materials; optical sensors; plasmonics; refractive index measurement; surface plasmon resonance; Au; figure of merit; infrared perfect absorber; nanobar; photonic microcavity; plasmonic resonance sensing; refractive index sensing; surface plasmon; Geometry; Gold; Optical surface waves; Plasmons; Refractive index; Sensors; Surface waves;

fLanguage

English

Publisher

ieee

Conference_Titel

Numerical Simulation of Optoelectronic Devices (NUSOD), 2012 12th International Conference on

Conference_Location

Shanghai

ISSN

2158-3234

Print_ISBN

978-1-4673-1602-6

Type

conf

DOI

10.1109/NUSOD.2012.6316516

Filename

6316516