High sensitivity surface plasmon resonance sensor based on phase interrogation at optimal incident wavelengths

Hai-Pang Chiang; Jing-Lun Lin; Zhi-Wei Chen
April 2006
Applied Physics Letters;4/3/2006, Vol. 88 Issue 14, p141105
Academic Journal
It is demonstrated that ultrahigh sensitivity of glucose refractive index measurement can be achieved via surface plasmon resonance excitation in which the phase difference between p- and s-polarized reflected waves is monitored as a function of the incident angle. Sensitivity with values down to the order of 10-8 is obtained by performing the measurements at optimal incident wavelengths. This represents an order of magnitude improvement compared to the previously reported values in the literature.


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