Analysis of Silicon Based Surface Plasmon Resonance Sensors with Different Amino Acids

• Published in: SILICON Vol. 7; no. 4; pp. 313 - 322
• Main Authors: Ghosh, Sharmila, Ray, Mina
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01.10.2015; Springer Nature B.V
• Subjects: Amino acids; Chemistry; Chemistry and Materials Science; Environmental Chemistry; Gold; Inorganic Chemistry; Lasers; Materials Science; Metal films; Metal surfaces; Optical Devices; Optics; Original Paper; Photonics; Plasmonics; Polymer Sciences; Refractivity; Sensors; Silicon; Surface plasmon resonance; Surface stability; Semiconductor prism; Surface plasmon resonance; Phase; Image response; Semiconductor nano-layer
• ISSN: 1876-990X; 1876-9918
• DOI: 10.1007/s12633-015-9293-8

A semiconductor prism coupler based nano-plasmonic sensor consisting of a high refractive index (RI) silicon prism, a gold (Au) metal film and different amino acids was used as a dielectric sample for sensing in the in the Attenuated Total Internal Reflection (ATIR) mode. An additional silicon nano-layer has been used for increasing stability and sensitivity of the surface plasmon resonance-sensor which causes enhancement of the evanescent field near the metal-analyte interface compared to the traditional three layer structure. Positional swap of the silicon nano-layer from above the metal surface to below the metal surface causes further enhances of the evanescent field near the metal-analyte interface. Performance of the nano-plasmonic sensors depending upon the high refractive index silicon prism, additional silicon nano-layer and swapping mechanism is discussed with the help of sensing performance for different amino acids with corresponding image response for the proposed nano-plasmonic sensor in a MATLAB environment.