1 December 2005 Application of spectral surface plasmon resonance to gas pressure sensing
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Optical Engineering, 44(12), 124403 (2005). doi:10.1117/1.2148913
Abstract
An optical sensor to be used for gas pressure detection is described. The device is based on the spectral response associated with the surface plasmon resonance (SPR) occurring on a 50-nm gold surface. The operation of the device relies on the fact that the refractive index of a gas changes with pressure, which leads to a shift in the resonance wavelength dip λSPR in the SPR curve. Experiments performed on nitrogen gas at room temperature demonstrated the sensor resolution of 4.4×10–5 RUI, which corresponds to a pressure resolution of 16 kPa. The new device offers the benefits of wide dynamic range, no moving parts, and possibly 2-D imaging of pressure distribution. Further development of the device may lead to a new type of optical pressure sensors.
Chi Lai Wong, HoPui Ho, Kwok-Sum Chan, Shu-Yuen Wu, Chinlon Lin, "Application of spectral surface plasmon resonance to gas pressure sensing," Optical Engineering 44(12), 124403 (1 December 2005). http://dx.doi.org/10.1117/1.2148913
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KEYWORDS
Refractive index

Surface plasmons

Sensors

Gold

Nitrogen

Optical engineering

Prisms

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