DING-WEI HUANGYao-Feng MaMing-Je SungChiao-Pan Huang2018-09-102018-09-102010-05https://www.scopus.com/inward/record.uri?eid=2-s2.0-78651242866&doi=10.1117%2f1.3431662&partnerID=40&md5=d46a60c4022811ca06da8aee32a50d5bSurface 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. © 2010 Society of Photo-Optical Instrumentation.biochemical optics; sensors; surface plasmonsAngular sensitivity; Light signal; Low index; Metal film; Resonant angle; SPR sensors; Surface plasmon resonance sensor; surface plasmons; Plasmons; Prisms; Sensors; Surface plasmon resonancejournal article10.1117/1.34316622-s2.0-78651242866WOS:000279632000021