Lumense’s sensor products are built around an optical waveguide, made using common semiconductor processing techniques. The waveguide contains channels that guide laser light through the waveguide to a detector. (Four pairs of channels are visible in the waveguide shown at the right.) Special coatings, which are selected or developed to be responsive to targets passing over the waveguide, are applied to one channel, the “sensing” channel, in each pair. The speed at which the laser light travels in a sensing channel is affected by the presence of target molecules in the coatings. The speed, or phase, difference, proportional to contaminant concentration, is measured in the optical “interference pattern” formed at the detector.

Lumense’s technology, based on patents and trade secrets exclusively licensed from the Georgia Tech Research Institute (GTRI) and supplemented by the company’s own intellectual property, is a platform from which dozens of products will be launched. Continuously and in real-time, the technology has been used to detect trace amounts (i.e. parts-per-million levels and below) of most types of substances, including notorious targets like TNT, BTEX chemicals, E. coli, Salmonella, anthrax, volatile organic compounds (VOCs), and ammonia. The following figure lists the substances detected so far, but that’s just the beginning. Tell us what you need. We can probably detect it.   

Previously Detected Substances
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How It Works (Presentation)
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