25 November 2014 Surface plasmon resonance structures in spectral interrogation using high refractive index prism materials for sensing of different amino acids
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Abstract
A prism coupler-based nano-plasmonic sensor consisting of a high refractive index (RI) prism (2S2G-prism, LASF9-prism), gold (Au) metal film, and different amino acids as the dielectric sample is used for sensing in attenuated total internal reflection mode. An additional semiconductor (silicon) nano-layer over the gold surface has been used for increasing the stability and sensitivity of the surface plasmon resonance sensor. A comparative analysis of performance of the nano-plasmonic sensors in the spectral regime using these two high RI prism materials with an additional semiconductor nano-layer has been presented. The sensing performance of the proposed nano-plasmonic sensors in terms of evanescent field enhancement, spectral sensitivity, detection accuracy, figure of merit, and Q-factor with different amino acid samples has been discussed along with supporting theoretical simulations in a MATLAB® environment.
© 2014 Society of Photo-Optical Instrumentation Engineers (SPIE)
Sharmila Ghosh, Mina Ray, "Surface plasmon resonance structures in spectral interrogation using high refractive index prism materials for sensing of different amino acids," Optical Engineering 53(11), 117108 (25 November 2014). https://doi.org/10.1117/1.OE.53.11.117108 . Submission:
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