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| Keywords: New Quantum Dot Transistor Counts Individual Photons (5941062028).jpg NIST's modified field-effect transistor can count single photons or particles of light When light enters through the transmission window see electron micrograph of top of device it penetrates the gallium arsenide absorbing layer and separates electrons from the holes they formerly occupied Quantum dots red dots trap the positively charged holes while electrons flow into the channel green Xs By measuring the channel current researchers can determine the number of photons absorbed Credit NIST Disclaimer Any mention of commercial products within NIST web pages is for information only; it does not imply recommendation or endorsement by NIST Use of NIST Information These World Wide Web pages are provided as a public service by the National Institute of Standards and Technology NIST With the exception of material marked as copyrighted information presented on these pages is considered public information and may be distributed or copied Use of appropriate byline/photo/image credits is requested https //www flickr com/photos/usnistgov/5941062028/ New Quantum Dot Transistor Counts Individual Photons 2007-10-11 11 14 https //www flickr com/people/63059536 N06 National Institute of Standards and Technology PD-USGov National Institute of Standards and Technology https //flickr com/photos/63059536 N06/5941062028 2016-09-07 02 11 06 United States Government Work Uncategorized 2016 September 10 | ||||
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