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O. Jaksic, Z. Jaksic, J. Matovic:
"Adsorption-desorption noise in plasmonic chemical/biological sensors for multiple analyte environment";
Microsystem Technologies - Micro- and Nanosystems - Information Storage and Processing Systems, 16 (2010), 735 - 743.

We investigated intrinsic noise in plasmonic
sensors caused by adsorption and desorption of gaseous
analytes on the sensor surface. We analyzed a general
situation when there is a larger number of different analyte
species. We applied our model to calculate various analyte
mixtures, including some environmental pollutants, toxic
and dangerous substances. The spectral density of mean
square refractive index fluctuations follows a dependence
similar to that of generation-recombination noise in photodetectors,
flat at lower frequencies and sharply decreasing
at higher. Some of the calculated noise levels are well
within the detection range of conventional surface plasmon
resonance sensors. An AD noise peak is observed in temperature
dependence of mean square refractive index
fluctuations, thus sensor operating temperature may be
optimized to obtain larger signal to noise ratio. A significant
property of AD noise is its rise with the decreasing
plasmon sensor area, which means that it will be even more
pronounced in modern nanoplasmonic devices. Our consideration
is valid both for conventional surface plasmon
resonance devices and for general nanoplasmonic devices.

http://dx.doi.org/10.1007/s00542-010-1043-7