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2005 | 107 | 2 | 328-332
Article title

Optical and Terahertz Characterization of Be-Doped GaAs/AlAs Multiple Quantum Wells

Content
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Languages of publication
EN
Abstracts
EN
We report on optical, photoreflectance and surface photovoltage, as well as terahertz photocurrent investigation of Be-doped GaAs/AlAs multiple quantum wells at room and liquid helium temperatures, respectively. From the Franz-Keldysh oscillations observed in photoreflectance spectra we determine built-in electric fields within the structure. Interband transition energies calculated by the transfer matrix method are in qualitative agreement with experimentally determined values for the samples having various, from 2×10^{10} up to 2.5×10^{12} cm^{-2}, Be doping densities. The photocurrent observed in the range of 5.4-7.3 THz we associate with photoionization of Be-acceptor states.
Keywords
EN
Contributors
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Semiconductor Physics Institute, A. Goštauto 11, 01108, Vilnius, Lithuania
author
  • Department of Physics, UMIST, Manchester M60 1QD, United Kingdom
author
  • Department of Physics, UMIST, Manchester M60 1QD, United Kingdom
author
  • Department of Electronic and Electrical Engineering, University of Sheffield, Sheffield S1 3JD, Sheffield, United Kingdom
author
  • IMP, School of Electronic and Electrical Engineering, University of Leeds, Leeds LS2 9JT, United Kingdom
References
  • 1. W.M. Zheng, M.P. Halsall, P. Harmer, P. Harrison, M.J. Steer, Appl. Phys. Lett., 84, 735, 04
  • 2. Shouvik Datta, Sandip Ghosh, B.M. Arora, Rev. Sci. Instrum., 72, 177, 01
  • 3. L. Kronik, Y. Shapira, Surf. Sci. Rep., 39, 1, 99
  • 4. R.F. Kirkman, R.A. Stradling, P.J. Lin-Chung, J. Phys. C, Solid State Phys., 11, 419, 78
  • 5. W.M. Zheng, P. Halsall, P. Harrison, J.-P.R. Wells, I.V. Bradley, M.J. Steer, Appl. Phys. Lett., 83, 3719, 03
  • 6. C.J. Summers, R. Dingle, D.E. Hill, Phys. Rev. B, 1, 1603, 70
Document Type
Publication order reference
Identifiers
YADDA identifier
bwmeta1.element.bwnjournal-article-appv107n222kz
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