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Article
Effects of collective excitations on the quantum well intersubband absorption
Faculty of Engineering - Papers (Archive)
  • X. W. Mi, Chinese Academy of Sciences, Shanghai, China
  • J. C. Cao, Chinese Academy of Sciences, Shanghai, China
  • C. Zhang, University of Wollongong
  • F. B. Meng, Jishou University, China
RIS ID
13704
Publication Date
15-11-2005
Publication Details

This article was originally published as: Mi, XW, Cao, JC, Zhang, C & Meng, FB, Effects of collective excitations on the quantum well intersubband absorption, Journal of Applied Physics, 98, November 2005, 103530-1-103530-5. Copyright American Institute of Physics. Original journal available here.

Abstract
The dependence of the intersubband absorption spectra on the Coulomb interaction and quantum well (QW) width is studied. Rather than following the Fermi–Dirac distribution, we have solved the intersubband equations of motion to determine the subband population self-consistently. We have gone beyond the linear absorption theory to show the effect of various many-body interactions on the absorption spectra. It is found that the redistribution of electrons in excited states reduces the absorption. Our results indicate that the line shape and peak position are determined by the interplay of different collective excitations, such as the Fermi edge singularity and the intersubband plasmon. The dependence of the absorption spectrum on the QW width and the subband effective masses is also discussed.
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Citation Information
X. W. Mi, J. C. Cao, C. Zhang and F. B. Meng. "Effects of collective excitations on the quantum well intersubband absorption" (2005)
Available at: http://works.bepress.com/czhang/19/