An optical sensor based on surface plasmon waves (SPW) interrogation for chemical sensing has been developed. The optical set-up is fabricated in a compact way by means of a resonant scanner which provides an angularly spread beam incident to the sensing element. The angular position of the excited surface plasmon depends on the chemical species at the surface. The instrument has been tested to detect small variation of refractive index of a liquid mixture in contact with the film.
A compact optical chemical sensor based on surface plasmon interrogation
MARTINELLI, MARIO
1992-01-01
Abstract
An optical sensor based on surface plasmon waves (SPW) interrogation for chemical sensing has been developed. The optical set-up is fabricated in a compact way by means of a resonant scanner which provides an angularly spread beam incident to the sensing element. The angular position of the excited surface plasmon depends on the chemical species at the surface. The instrument has been tested to detect small variation of refractive index of a liquid mixture in contact with the film.File in questo prodotto:
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