Optical absorption of a quantum well with an adjustable asymmetry |
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Authors: | H Yildirim M Tomak |
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Institution: | (1) Department of Physics, Middle East Technical University, Ankara, 06531, Turkey |
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Abstract: | The effects of asymmetry and the electric field on the
electronic subbands and the nonlinear intersubband optical
absorption of GaAs quantum wells represented by a P?schl-Teller
confining potential are studied. The potential itself can be made
asymmetric through a correct choice of its parameter set and this
adjustable asymmetry is important for optimizing the absorption. In
that way optimal cases can be created. We calculate the modified
wave functions and electronic subbands variationally. The linear and
the nonlinear optical intersubband absorption coefficients are
calculated. Numerical results for a typical GaAs quantum well are
presented. The nonlinear part of the absorption coefficient is
strongly modified by the asymmetry parameters while the electric
field affects it at smaller values of the parameters.
- 78.67.De Quantum wells |
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Keywords: | 42 65 Ky Frequency conversion harmonic generation including higher-order harmonic generation |
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