Now, Le Ds May Give Lasers A Run For The Money
Light-emitting diodes are the poor cousins of lasers. Although cheaper and more reliable than lasers, they're not as bright and can't turn on and off as rapidly. That's why lasers are the light sources of choice for fiber optics, laser printers, and fax machines. Now, though, scientists at AT&T Bell Laboratories have a brighter, faster light-emitting diode (LED) that uses so-called microcavity effects.
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