Abstract
For pt.I see ibid., vol.27, p.1347-58 (1991). A method for the theoretical analysis of the spontaneous emission factor (C factor) has been developed for microcavity distributed Bragg reflector (DBR) surface emitting lasers having various quantum-well active regions. It is shown that the C factor can be enlarged by the enhancement of mode density, the anisotropic emission, and the narrow spectral width in quantum wells. C approximately 0.6 may be obtained with GaAs-AlAs DBRs, 0.55 mu m*0.55 mu m cross section of the cavity, three times vertically long cross section of quantum-wire active regions, and the spectral width of several nanometers at room temperature. This value can be further increased by utilizing a narrower spectral width expected at low temperature.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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