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(Color online) Scanning-electron microscope image of gold microbeam resonators prior to deposition of chemoselective coating.
(Color online) Optical setup for interrogation and readout of micromechanical sensor. BS: beam splitter; HP: high pass; PD: photodetector; WDM: wavelength division multiplexer.
(Color online) Reflectivity spectrum from the microcavity formed by the microbeam and the gold-coated substrate.
(Color online) Mechanical vibration spectrum acquired with the readout laser tuned to . Inset: Change in the resonant frequency upon exposure to toluene.
(Color online) Detection of toluene vapor by monitoring the resonant frequency of the microbeam. The lower plot shows when the microbeam is exposed to the toluene vapor.
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