Infrared optical absorption in imperfect parabolic quantum wells

L. Brey, Jed Dempsey, Neil F Johnson, B. I. Halperin

Research output: Contribution to journalArticle

158 Citations (Scopus)

Abstract

The effects of possible imperfections on the infrared optical absorption and on the charge-density profile of wide parabolic quantum wells (WPQWs) are studied. We consider effects that can arise from the finite width of WPQWs, from the existence of a quartic component in the confining potential, and from the existence of a region of flat potential in the center of the well. Within the local-density approximation, we confirm that a perfect WPQW absorbs light only at the bare harmonic-oscillator frequency, and show that the effects of small imperfections of the types considered on the absorption spectrum are twofold: a shift in the location of the main peak and the appearance of new peaks nearby.

Original languageEnglish (US)
Pages (from-to)1240-1247
Number of pages8
JournalPhysical Review B
Volume42
Issue number2
DOIs
StatePublished - 1990
Externally publishedYes

Fingerprint

Light absorption
Semiconductor quantum wells
optical absorption
quantum wells
Infrared radiation
Local density approximation
Defects
defects
Charge density
confining
harmonic oscillators
Absorption spectra
absorption spectra
shift
profiles
approximation

ASJC Scopus subject areas

  • Condensed Matter Physics

Cite this

Brey, L., Dempsey, J., Johnson, N. F., & Halperin, B. I. (1990). Infrared optical absorption in imperfect parabolic quantum wells. Physical Review B, 42(2), 1240-1247. https://doi.org/10.1103/PhysRevB.42.1240

Infrared optical absorption in imperfect parabolic quantum wells. / Brey, L.; Dempsey, Jed; Johnson, Neil F; Halperin, B. I.

In: Physical Review B, Vol. 42, No. 2, 1990, p. 1240-1247.

Research output: Contribution to journalArticle

Brey, L, Dempsey, J, Johnson, NF & Halperin, BI 1990, 'Infrared optical absorption in imperfect parabolic quantum wells', Physical Review B, vol. 42, no. 2, pp. 1240-1247. https://doi.org/10.1103/PhysRevB.42.1240
Brey, L. ; Dempsey, Jed ; Johnson, Neil F ; Halperin, B. I. / Infrared optical absorption in imperfect parabolic quantum wells. In: Physical Review B. 1990 ; Vol. 42, No. 2. pp. 1240-1247.
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