Accession Number : ADP007837

Title :   Cavity Quantum Electrodynamics in Semiconductor Laser,

Corporate Author : NIPPON TELEGRAPH AND TELEPHONE CORP TOKYO

Personal Author(s) : Yamamoto, Y. ; Horowicz, R. ; Machida, S. ; Bjoerk, G. ; Richardson, W. H.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : A one-dimension (planar) microcavity structure shown in can increase the coupling efficiency Beta of spontaneous emission into a single cavity resonant mode, if the spontaneous emission spectral width Aw. is smaller than the microcavity resonance width Awc and if the refractive-index difference An is fairy large. The loss of spontaneous emission into spurious modes, 1-Beta, are clue to the two (degenerate) orthogonal polarization modes and the leaky guided modes propagating in a plane of the microcavity. A three-dimensional (waveguide) microcavity structure shown in features several advantages over the one-dimensional structure. The increase in Beta is realized without requiring delta(omega sub e) delta(omega sub c) and large delta n. The degeneracy of the two orthogonal polarization mode's can 'be lifted and the leaky guided modes, can be made cut-off by the waveguide structure. Therefore, the spurious spontaneous emission into these modes can be suppressed. The spontaneous emission lifetime T, can be also decreased in the three-dimensional microcavity. On the other hand, the one-dimensional microcavity cannot decrease Tav sub delta but can only increase Tau sub delta.

Descriptors :   *SEMICONDUCTOR LASERS, *LASER CAVITIES, *OPTICAL PUMPING, COUPLINGS, EFFICIENCY, EMISSION, HANDS, ONE DIMENSIONAL, POLARIZATION, REFRACTIVE INDEX, RESONANCE, STRUCTURES, THREE DIMENSIONAL, WAVEGUIDES, JAPAN.

Subject Categories : Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE