Key points are not available for this paper at this time.
The condition for coherent laser emission from forward-biased p-n junctions 1-3 can be written as 4 equation 1. . . order for the reported values 1-3 of Ic/A to agree with Eq. (1), must must use values pf d ~50 μ 4. The question arises as to the nature of the mechanism which could confine the light generated near the junction to such small distances.
Yariv et al. (1963) studied this question.
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