Title :
Application of differential phase measurement technique to surface plasmon resonance imaging sensors
Author :
Ho, H.P. ; Lam, W.W. ; Wong, P.L. ; Guo, F.
Author_Institution :
Dept. of Phys. & Mater. Sci., City Univ. of Hong Kong, Kowloon, China
Abstract :
In this paper, a differential phase imaging technique applied to optical surface plasmon resonance (SPR) sensors is presented. The technique makes use of the s-polarisation as the reference beam to interfere with the p-polarisation, of which the phase has a close relationship with the change of SPR conditions at the sensor surface. As a trial experiment, the SPR phase shift between water and air has been measured. Our results suggest a measurement accuracy of 5×10-2 rad.
Keywords :
biosensors; light interference; light polarisation; medical image processing; phase measurement; surface plasmon resonance; 2D biosensor arrays; differential phase measurement techniques; measurement accuracy; optical SPR sensors; p-polarisation interference; s-polarisation reference beam; sensor surface SPR condition change; surface plasmon resonance imaging sensors; water/air SPR phase shift measurement; Absorption; Image sensors; Optical films; Optical imaging; Optical sensors; Optical surface waves; Phase measurement; Plasmons; Polarization; Resonance;
Conference_Titel :
Electron Devices Meeting, 2002. Proceedings. 2002 IEEE Hong Kong
Print_ISBN :
0-7803-7429-0
DOI :
10.1109/HKEDM.2002.1029156
