Enhancing Intensity and Refractive Index Sensing Capability with Infrared Plasmonic Perfect Absorbers
An infrared refractive index sensor based on plasmonic perfect absorbers for glucose concentration sensing is experimentally demonstrated. Utilizing substantial absorption contrast between a perfect absorber (~98% at normal incidence) and a non-perfect absorber upon the refractive index change, a maximum value of figure of merit (FOM*) about 55 and a bulk wavelength sensitivity about 590 nm/RIU are achieved. The demonstrated sensing platform provides great potential in improving the performance of plasmonic refractive index sensors and developing future surface enhanced infrared spectroscopy. © 2014 Optical Society of America.
F. Cheng et al., "Enhancing Intensity and Refractive Index Sensing Capability with Infrared Plasmonic Perfect Absorbers," Optics Letters, Optical Society of America, Jan 2014.
The definitive version is available at http://dx.doi.org/10.1364/OL.39.003185
Mechanical and Aerospace Engineering
Article - Journal
© 2014 Optical Society of America, All rights reserved.