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Proceedings Article

Dielectric response function of a quasi-two-dimensional electron gas in a finite confining potential semiconductor quantum well

[+] Author Affiliations
K. H. Aharonyan

State Engineering Univ. (Armenia)

Proc. SPIE 7998, International Conference on Laser Physics 2010, 79981D (March 04, 2011); doi:10.1117/12.890977
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From Conference Volume 7998

  • International Conference on Laser Physics 2010
  • Aram V. Papoyan
  • Ashtarak, Armenia | October 12, 2010

abstract

The spatial and time dependencies of the dielectric function for the quasi-two dimensional (Q2D) electron gas (EG) in a finite confining potential quantum well (QW) are calculated by using a self-consistent approach (SQF). Taking into account the influences of mismatch of strong discontinuous dielectric constant and effective masse across the interfaces the dielectric response function analytic expressions are derived for a rectangular finite potential barrier QW for the first time. The deviations from the results when these mismatches are absent are established. By using exactly calculated dielectric function a comparison with the respective asymptotic expressions of finite and infinite confining models is presented both analytically and numerically on the base of realistic EuS/PbS/EuS QW. The transition interval between 2D and 3D cases has been demonstrated numerically.

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Citation

K. H. Aharonyan
"Dielectric response function of a quasi-two-dimensional electron gas in a finite confining potential semiconductor quantum well", Proc. SPIE 7998, International Conference on Laser Physics 2010, 79981D (March 04, 2011); doi:10.1117/12.890977; http://dx.doi.org/10.1117/12.890977


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