A new sensing approach based on the use of an optical Fabry–Pérot (FP) cavity in conjunction with surface plasmon resonance (SPR) is proposed and theoretically investigated. The impact of the SPR on the intensity and phase response of the proposed sensor structure is evaluated using a modified FP model that takes into account the SPR effect. Compared to the conventional optical-phase-detection-based Kretschmann configuration, the proposed sensing approach requires only the measurement of the output power spectrum over a narrow wavelength span of several nanometers to evaluate the phase responses of the sensor, making it more attractive for practical high-sensitivity sensing applications.
© 2012 Optical Society of America
Optics at Surfaces
Original Manuscript: September 13, 2012
Manuscript Accepted: September 24, 2012
Published: November 6, 2012
Vol. 7, Iss. 12 Virtual Journal for Biomedical Optics
Feng Xiao, Guangyuan Li, Kamal Alameh, and Anshi Xu, "Fabry–Pérot-based surface plasmon resonance sensors," Opt. Lett. 37, 4582-4584 (2012)