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Pressure sensing by surface plasmon resonance in the Otto configuration

An Otto chip device fabricated on silicon and sealed with a quartz window has recently been demonstrated as a potential alternative for the traditional Kretschmann based configuration for the development of surface plasmon resonance — SPR — sensors. We have fabricated open Otto chip structures as well and have characterized the surface plasmon resonance — SPR — effect at a wavelength of 975.1 nm. In this paper we report on the potential of these structures to act as pressure sensors.