Abstract
In this paper we propose Otto surface plasmon resonance (SPR) system with tunable air-gap using piezoactuator for the first time. The proposed Otto configuration based SPR system include a piezoactuator for varying an air-gap distance between a prism and gold surface. We verified effects of air-gap variation in Otto SPR system and the measured results show that the Otto SPR sensor can be realized with a metal film and prism by using a microactuator without complex microfabrication process for specific air-gap distance.
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