SPR waveguide sensor based on combined sensing of phase and amplitude changes

R. Levy; S. Ruschin

doi:10.1117/12.698588

9 February 2007 SPR waveguide sensor based on combined sensing of phase and amplitude changes

R. Levy, S. Ruschin

Proceedings Volume 6475, Integrated Optics: Devices, Materials, and Technologies XI; 64750R (2007) https://doi.org/10.1117/12.698588
Event: Integrated Optoelectronic Devices 2007, 2007, San Jose, California, United States

Abstract

This paper describes a high sensitivity integrated optical sensor based on combined sensing of modal changes including amplitude, phase, and shape. The scheme is extremely simple, consisting of a single waveguide structure supporting two guided modes acting as sensor section, and a single guided mode in the output section. The transition of modes from the sensing to the output section is designed so that both modes contribute to the power of the output section mode. In this method, small changes in the sensing section are translated into power changes in the output section. Sensitivity values calculated for the new structure are an order of magnitude higher compared to previously reported SPR sensors. External control of the differential phase between the two propagating modes allows higher sensitivity, extended working range, and simplifies fabrication constraints.

Citation Download Citation

R. Levy and S. Ruschin "SPR waveguide sensor based on combined sensing of phase and amplitude changes", Proc. SPIE 6475, Integrated Optics: Devices, Materials, and Technologies XI, 64750R (9 February 2007); https://doi.org/10.1117/12.698588

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