Journal
OPTICAL ENGINEERING
Volume 49, Issue 5, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.3431662
Keywords
surface plasmons; sensors; biochemical optics
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Funding
- Ministry of Education, Taiwan
- National Science Council, Taiwan [NSC 97-2221-E-002-042, NSC 98-2221-E-002-024]
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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. (C) 2010 Society of Photo-Optical Instrumentation Engineers. [DOI: 10.1117/1.3431662]
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