Sensitivity enhancement of guided-wave surface-plasmon resonance sensors Academic Article uri icon

abstract

  • It is demonstrated theoretically and experimentally that, by using the guided-wave surface- plasmon sensor configuration with a top layer of dielectric thin film (10–15 nm) having a high value of the real part of the dielectric function, it is possible to improve the sensitivity of the sensor up to 1 order of magnitude. The stability is improved because the thin nanolayer acts as a protection layer for the metal. The enhancement is due to the increase in the interaction volume and the evanescent field enhancement near the top layer–analyte interface.

publication date

  • January 1, 2008