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Abstract

Incorporating the dependence on transverse position co-ordinate x of both recombination and optical absorption in a light emitting diode (LED) with laser structure, a theoretical study has been made of phase relations between a sinusoidal driving current and the light output. The theory yields a phase variation with x accordant to a carrier-diffusion controlled recombination wave, including the diode transient behavior due to charge storage. The phase selection by an appropriate absorption profile transverse to the recombination region is found to be of extraordinary importance for the bowing of the optical wave front at the radiating area.