Application of differential phase measurement technique to surface plasmon resonance imaging sensors

H.P. Ho1, W.W. Lam1, P.L. Wong2, F. Guo2
1Department of Physics and Materials Science, City University of Hong Kong, Hong Kong, China
2Department of Manufacturing Engineering, City University of Hong Kong, Hong Kong, China

Tóm tắt

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/spl times/10/sup -2/ rad.

Từ khóa

#Phase measurement #Plasmons #Resonance #Image sensors #Optical imaging #Optical surface waves #Polarization #Optical films #Optical sensors #Absorption

Tài liệu tham khảo

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