Surface plasmon resonance based fiber optics imaging and sensing

• Main Author: Chuah, Boon Keong.
• Other Authors: Murukeshan Vadakke Matham
• Format: Final Year Project
• Language: English
• Published: 2013
• Subjects: DRNTU::Engineering::Mechanical engineering
• Online Access: http://hdl.handle.net/10356/53544
• Institution: Nanyang Technological University

This project demonstrates a triple mode (sensing, imaging and phase shift measurement) set up using surface plasmon resonance (SPR) based senor and optical fiber. Kretschmann prism is used as the SPR sensor and an optical fiber based probe system with high resolution to transmit the image to the CCD camera. In order to obtain optimal results for SPR, parameter like gold thickness and dielectric constant for the dye layer were investigated. Matlab results suggest that gold thickness affects the refractive index resolution and optimal thickness can bring the reflectance dropped to near zero. The result also suggests that additional dye layer will either reduce or amplify the sensitivity of SPR sensor, detail analysis will be discussed in the report. Using the optimized parameters, experiments were carried out to image and sense test particles. This project focuses on the triple mode set up, which is rarely seen in all the other projects, it may also provide researches with valuable ideas of how SPR based sensor can be used to image and sense simultaneously hence encouraging them to take this set for future development.