Optical multilayers for LED-based surface plasmon resonance sensors.
We address a structure for surface plasmon resonance (SPR) sensing supporting a symmetric bound surface plasmon, which results in a SPR feature narrower by a factor of 2 compared with that for the conventional configuration. We demonstrate that it enables a low-cost and low-power-consumption LED to be used as a polychromatic light source, which leads to a decrease in the sensor cost and an increase in the sensor miniaturization potential. Further, we show that these advancements are not at the expense of sensor performance in terms of its sensitivity and resolution. We show that the sensor can be designed to have similar sensitivity and even better resolution compared with those for a conventional configuration.
Slavík
Radan
R
Institute of Radio Engineering and Electronics, Academy of Sciences of the Czech Republic, Prague. slavik@ure.cas.cz
Homola
Jirí
J
D004867:Equipment Design; D019544:Equipment Failure Analysis; D008029:Lighting / Q000295:instrumentation* / Q000379:methods; D008422:Materials Testing; D055095:Optics and Photonics / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry* / Q000528:radiation effects; D012666:Semiconductors; D020349:Surface Plasmon Resonance / Q000295:instrumentation* / Q000379:methods; D013635:Tantalum / Q000737:chemistry* / Q000528:radiation effects; D014159:Transducers
D010087:Oxides; D013635:Tantalum; C078151:tantalum oxide