Title :
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
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;
Conference_Titel :
Numerical Simulation of Optoelectronic Devices (NUSOD), 2012 12th International Conference on
Conference_Location :
Shanghai
Print_ISBN :
978-1-4673-1602-6
DOI :
10.1109/NUSOD.2012.6316516
