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research article
Variational Calculation of Fano Linewidth - Application to Excitons in Quantum-Wells
1991
A procedure for calculating the resonance width of a state degenerate with a continuum is proposed. It is based on a diagonalization of the Hamiltonian on a finite variational basis followed by application of the Fano theory on the resulting eigenstates. The method is first tested on a one-dimensional model that admits an exact solution, and then applied to the problem of the light-hole (LH) exciton in narrow GaAs-Ga(1-x)Al(x)As quantum wells. The resonance width of the LH exciton is found to be of the order of a meV, and to increase as the well width is reduced.
Type
research article
Web of Science ID
WOS:A1991GC06600037
Authors
Publication date
1991
Published in
Volume
44
Issue
7
Start page
3162
End page
3167
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
October 8, 2009
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