Abstract
The quantum efficiency of spontaneous emission coupled into a single laser mode is of the order of 10−5 for a usual semiconductor laser. Thus a typical threshold current is as high as 10 mA. We have shown theoretically and experimentally that the quantum efficiency can be increased close to one by concentrating the spontaneous radiation pattern in a normal direction in a 1-D periodic structured microcavity.
© 1990 Optical Society of America
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