spie - int'l optics & photonics socity, page-2

The following is the presentation topic on May 6th from Gino and his mates:

An optically resonant position read-out system for microcantilever gas sensors
Paper 9083-112
Time: 6:00 PM - 7:30 PM
Author(s): Gino Putrino, Adrian Keating, Mariusz Martyniuk, Lorenzo Faraone, John M. Dell, The Univ. of Western Australia (Australia)
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This presentation describes a novel optical readout system for microcantilever gas sensors. A deflection noise density (DND) of 1 pm/sqrt(Hz) is demonstrated using low power infra-red lasers, giving rise to the ability to sense the thermally stimulated Brownian motion of microcantilevers at room temperature and pressure. This provides the ability to determine the resonant frequency of a cantilever without providing electrostatic actuation, and gives rise to the possibility to create remote sensing solutions using fiber-fed, passive MEMS sensors.