Radiative decay of Wannier excitons in thin crystal films

K.C. Liu and Y.C. Lee

Physica A: Statistical Mechanics and its Applications, 1980, vol. 102, issue 1, 131-144

Abstract: The radiative decay of the Wannier exciton in thin crystal films is studied by the method of Heitler and Ma in the resonance approximation. It is shown that, while the broken crystal symmetry opens up the possibility of radiative decay, the correlation brought about by the interaction of the lattice atoms with a common radiation field leads to a superradiative enhancement of the decay rate. However, when it is compared with the corresponding case of a Frenkel exciton, the decay rate of the Wannier exciton is reduced due to the averaging of the dipole transition matrix element over the various possible distances between the widely separated electron and hole.

Date: 1980
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:102:y:1980:i:1:p:131-144

DOI: 10.1016/0378-4371(80)90065-5

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