Share Email Print

Optical Engineering

Application of spectral surface plasmon resonance to gas pressure sensing
Author(s): Chi Lai Wong; HoPui Ho; Kwok-Sum Chan; Shu-Yuen Wu; Chinlon Lin
Format Member Price Non-Member Price
PDF $20.00 $25.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper 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.

Paper Details

Date Published: 1 December 2005
PDF: 6 pages
Opt. Eng. 44(12) 124403 doi: 10.1117/1.2148913
Published in: Optical Engineering Volume 44, Issue 12
Show Author Affiliations
Chi Lai Wong, City Univ. of Hong Kong (Hong Kong China)
HoPui Ho, The Chinese Univ. of Hong Kong (Hong Kong China)
Kwok-Sum Chan, City Univ. of Hong Kong (Hong Kong China)
Shu-Yuen Wu, The Chinese Univ. of Hong Kong (Hong Kong China)
Chinlon Lin, The Chinese Univ. of Hong Kong (Hong Kong China)

© SPIE. Terms of Use
Back to Top