Linked by Flatland_Spider on Fri 21st Nov 2008 13:28 UTC
What's after electrical charges and electricity in computer storage? Lasers and excitons. Theorists from the John Hopkins University have drafted a theory that uses low-power lasers and crystalline insulators to store data. In the theory, lasers would excite electrons in a crystalline-like lattice in order to record data; the atoms would vibrate at a certain frequency to indicate the type of bit. A side effect of using lasers and insulators is reduced heat output. The heat is reduced because the atoms do not exchanging electrons as current computer components do. The EE Times has a more detailed write up as well as WebIndia, TopNews.in, Eureka Alert, and Small Times.
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Member since:
2007-11-04
Well I am a physicist, an optical physicist in fact and I can tell you that all this talk of optical computers is pretty much rubbish. The effect these guys discovered is quite nice, and might even be useful, however, we are not going to use it in optical computers. There might be a need for doing some logic all optical, but optical computers are a step back not forward, both in terms of power consumption and size. In order to do all-optical logic, you need powers in at least the milliwatt range, compared to nano or subnano Watts for electronic logic. Secondly, the size, waveguides for light are a few micrometres in diameter, have fun building a chip from that.
Generally, all this talk about optical computers is sensationalism.
Cheers
Jochen