Application of spectral surface plasmon resonance to gas pressure sensing

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

Detail(s)

Original languageEnglish
Article number124403
Journal / PublicationOptical Engineering
Volume44
Issue number12
Publication statusPublished - Dec 2005

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 develogment of the device may lead to a new type of optical pressure sensors. © 2005 Society of Photo-Optical Instrumentation Engineers.

Research Area(s)

  • Optical sensors, Surface plasmon resonance

Citation Format(s)

Application of spectral surface plasmon resonance to gas pressure sensing. / Wong, Chi-Lok; Ho, HoPui; Chan, Kwok-Sum; Wu, Shu-Yuen; Lin, Chinlon.

In: Optical Engineering, Vol. 44, No. 12, 124403, 12.2005.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review