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Optical ethanol vapor sensor shows potential of SOI-based integrated gas sensors

An ethanol vapor sensor is fabricated using a ZnO nanoparticle film as a coating on a silicon-on-insulator (SOI) microring resonator of 5 micrometer in radius. The sensor can detect ethanol vapor concentrations as low as 100ppm. This achievement successfully demonstrates the potential of SOI technology for the development of sensitive, compact, low-power and inexpensive optical gas sensing devices.

Jun 22nd, 2010

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Communication through chemistry: 'Fuses' convey information for hours

We currently transmit information electronically; in the future we will most likely use photons. However, these are not the only alternatives. Information can also be transmitted by means of chemical reactions. George M. Whitesides and his colleagues at Harvard University have now developed a concept that allows transmission of alphanumeric information in the form of light pulses with no electricity: the 'infofuse'.

Jun 21st, 2010

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Light chip breaks speed records

Physicists at the University of Sydney have brought silicon chips closer to performing all-optical computing and information processing that could overcome the speed limitations intrinsic to electronics, with the first report published of an on-chip all-optical temporal integrator.

Jun 18th, 2010

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