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Optical Engineering

Approach the angular sensitivity limit in surface plasmon resonance sensors with low index prism and large resonant angle
Author(s): Ding-Wei Huang; Yao-Feng Ma; Ming-Je Sung; Chiao-Pan Huang
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Paper Abstract

Surface plasmon resonance (SPR) sensors have been studied thoroughly for the past two decades. However, we found that the angular sensitivity in a prism-coupled SPR sensor can be as high as 500 deg/refractive index unit (RIU), which is two times higher than the sensitivity that has ever been achieved in previous studies. Such a high angular sensitivity can be fully achieved by simply choosing a proper low-index prism and a sufficiently large resonant angle for the light signal at an appropriate wavelength with an optimal metal film thickness. A feasible implementation of such an SPR sensor design concept was also proposed, and an even higher sensitivity of 600 deg/RIU can be achieved.

Paper Details

Date Published: 1 May 2010
PDF: 6 pages
Opt. Eng. 49(5) 054403 doi: 10.1117/1.3431662
Published in: Optical Engineering Volume 49, Issue 5
Show Author Affiliations
Ding-Wei Huang, National Taiwan Univ. (Taiwan)
Yao-Feng Ma, National Taiwan Univ. (Taiwan)
Ming-Je Sung, National Taiwan Univ. (Taiwan)
Chiao-Pan Huang, National Taiwan Univ. (Taiwan)

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