This article is cited in 13 papers

Lasers

Quantum dot laser

A. N. Oraevsky^a, M. O. Sculli^b, V. L. Velichansky<sup>a

a</sup> P. N. Lebedev Physical Institute, Russian Academy of Sciences, Moscow
^b Texas A&M University, USA

Abstract: An analysis is made of the self-excitation condition for a laser in which the active medium is a ‘quantum dot’ and a whispering-gallery mode of a dielectric microsphere acts as the cavity. It is pointed out that the interaction of a quantum dot with an ensemble of degenerate or near-degenerate modes increases the laser excitation coefficient. A calculation is made of the dependence of the effective volume of a whispering-gallery mode on its index. It is shown that the field maximum of an E-type whispering-gallery mode lies on the surface of a sphere, whereas for an H-type mode this maximum is shifted along the radius into the sphere. Calculations suggest that it should be possible to construct a microlaser even on the basis of a single quantum dot.

PACS: 42.55.Rz, 73.20.Dx

Received: 24.11.1997

 English version: Quantum Electronics, 1998, 28:3, 203–208

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