Field-enhanced Stokes shifts in tensilely strained carbon-based quantum wells
- 14 June 1999
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 74 (24) , 3630-3632
- https://doi.org/10.1063/1.123204
Abstract
A large, rigid downward shift of excitonic luminescence peak energies was observed with increasing transverse electric field in tensilely strained Si 1−y C y / Si(001) symmetric quantum wells, as opposed to theoretical calculations predicting a blueshift due to exciton weakening, which more than balances the redshift due to quantum-confined Stark effects. The observed anomalies are interpreted in terms of field-enhanced Stokes shifts which occur due to carrier relaxation in an inhomogeneously distributed potential of the grown-in Si 1−y C y / Si interfaces.Keywords
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