Imprint Rides Photonic Crystal Wave

TOP STORY... April 20, 2009

Light-emitting diodes (LEDs) may gain efficiencies by using photonic crystals defined by imprint lithography. A range of LED makers are developing photonic-crystal LEDs as a way of improving light extraction and beam shaping. Challenges include that the wafers are not very clean or flat, and tend to have surface nodules several microns in size. 
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