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High-sensitivity small-angle sensor based on surface plasmon resonance technology and heterodyne interferometry

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Abstract

A high-sensitivity small-angle sensor based on surface plasmon resonance technology and heterodyne interferometry is proposed that uses a new technique with two right-angle prisms. Interestingly, the technique provides a novel method for designing small-angle sensors with high sensitivity and high resolution. Its theoretical resolution can reach 1.2×107 rad over the measurement range of 0.15°θ0.15°. The method has some merits, e.g., a simple optical setup, easy operation, high resolution, high sensitivity, and rapid measurement. Its feasibility is demonstrated.

© 2006 Optical Society of America

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