Sensitivity of (bio)-chemical sensors based on laser-excited surface plasmon resonance

Joel Villatoro; Augusto Garcia-Valenzuela

doi:10.1117/12.361280

2 September 1999 Sensitivity of (bio)-chemical sensors based on laser-excited surface plasmon resonance

Joel Villatoro, Augusto Garcia-Valenzuela

Proceedings Volume 3878, Miniaturized Systems with Micro-Optics and MEMS; (1999) https://doi.org/10.1117/12.361280
Event: Symposium on Micromachining and Microfabrication, 1999, Santa Clara, CA, United States

Abstract

In this paper we analyze the effect of the laser beam divergence on the sensitivity of optical sensors based on surface plasmon resonance (SPR) using the Kretschmann configuration. The analysis is done by assuming that a Gaussian beam is employed. Numerical results are presented that show quantitatively the influence of the laser beam's waist on the SPR curve main characteristics. An example using the exact Fresnel coefficient, with optimal parameters reported in the literature is fully analyzed. Our results may be important in the design of SPR optical sensors using fiber or integrated optics.

Citation Download Citation

Joel Villatoro and Augusto Garcia-Valenzuela "Sensitivity of (bio)-chemical sensors based on laser-excited surface plasmon resonance", Proc. SPIE 3878, Miniaturized Systems with Micro-Optics and MEMS, (2 September 1999); https://doi.org/10.1117/12.361280

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