TITLE

Tenfold improved sensitivity using high refractive-index substrates for surface plasmon sensing

AUTHOR(S)
Micheletto, Ruggero; Hamamoto, Katsumi; Fujii, Takashi; Kawakami, Yoichi
PUB. DATE
October 2008
SOURCE
Applied Physics Letters;10/27/2008, Vol. 93 Issue 17, p174104
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Surface plasmon resonance sensors exploit the high sensitivity to local perturbations of plasma waves in a thin metal layer. These devices have a wide range of applications as biomedical, environmental, industrial, and homeland security. We concentrate on the theoretical aspects of the sensing principle. By calculations at various indexes of refraction we proved that using substrate material of higher index, sensitivity and dynamics range improve conspicuously. Finally, we show experimental data taken using a special transparent ceramic material of exceptionally high index of refraction n=2.04. Tests demonstrate sensitivity about one order of magnitude better than those obtained with conventional BK7 glass.
ACCESSION #
35279040

 

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