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Theory of gain in quantum-wire lasers grown in V-grooves

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2 Author(s)
Citrin, D.S. ; Max-Planck-Inst. fuer Festkorperforschung, Stuttgart, Germany ; Chang, Yia-Chung

Theoretical calculations of gain, refractive index change, differential gain, and threshold current for GaAs-AlGaAs quantum-wire lasers grown in V-shaped grooves are presented. The theoretical model is based on the density-matrix formalism with intraband relaxation, and the subband structure is calculated within the effective bond-orbital model. For the quantum-wire geometry treated, agreement with the observed subband spacings is found. Because of the small overlap of the optical field with the active region for a single quantum wire, lasing threshold is reached only when several subbands are filled

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Quantum Electronics, IEEE Journal of  (Volume:29 ,  Issue: 1 )