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Magnetophoton-phonon scattering in two-dimensional electron gases

Chapter


Abstract


  • Terahertz electromagnetic (EM) radiation is in the far-infrared

    light band. f = 1 THz in frequency is 299.79 l.lm in wavelength, 47.99 K in temperature,

    and 4.14 meV in energy. It is well-known that in semiconductor nanostructures

    such as two-dimensional electron gases (2DEGs), the conducting electrons are

    confined within nanometer distances so that the electron kinetic energy, electronic

    subband energy, Fermi energy, plasmon energy, phonon energy, etc. are of t.he order

    of the THz photon energies. This implies that the intense THz radiation can couple

    strongly to the 2DEG systems. In these device systems, the rate for electronic scattering

    with impurities arid phonons can also be comparable with the

    THz photon frequencies, which suggests that the intense THz radiation can modify

    strongly the processes for momentum and energy relaxation of elect.rons in a 2DEG.

    Furthermore, for semiconductor materials such as GaAs, f = 1 THz in frequency

    is 2.38 T in magnetic field. This indicates that in the presence of an inteuse THz

    laser field and a quantising magnetic field, interesting radiation phenomena can be

    observed ill the 2DEG systems. Hence, intense THz laser radiation is a powerful t.ool

    in the investigation of semiconductor nanostrtlctures such as 2DEGs.

UOW Authors


  •   Xu, Wen (external author)
  •   Lewis, R A.
  •   Koenraad, P M (external author)
  •   Waumans, L R C (external author)
  •   Langerak, C J G M (external author)

Publication Date


  • 2003

Citation


  • Xu, W., Lewis, R. A., Koenraad, P. M., Waumans, L. RC. & Langerak, C. JGM. (2003). Magnetophoton-phonon scattering in two-dimensional electron gases. In M. Das & F. Green (Eds.), Condensed Matter Theories (pp. 373-382). New York: Nova Science Publishers.

Book Title


  • Condensed Matter Theories

Start Page


  • 373

End Page


  • 382

Abstract


  • Terahertz electromagnetic (EM) radiation is in the far-infrared

    light band. f = 1 THz in frequency is 299.79 l.lm in wavelength, 47.99 K in temperature,

    and 4.14 meV in energy. It is well-known that in semiconductor nanostructures

    such as two-dimensional electron gases (2DEGs), the conducting electrons are

    confined within nanometer distances so that the electron kinetic energy, electronic

    subband energy, Fermi energy, plasmon energy, phonon energy, etc. are of t.he order

    of the THz photon energies. This implies that the intense THz radiation can couple

    strongly to the 2DEG systems. In these device systems, the rate for electronic scattering

    with impurities arid phonons can also be comparable with the

    THz photon frequencies, which suggests that the intense THz radiation can modify

    strongly the processes for momentum and energy relaxation of elect.rons in a 2DEG.

    Furthermore, for semiconductor materials such as GaAs, f = 1 THz in frequency

    is 2.38 T in magnetic field. This indicates that in the presence of an inteuse THz

    laser field and a quantising magnetic field, interesting radiation phenomena can be

    observed ill the 2DEG systems. Hence, intense THz laser radiation is a powerful t.ool

    in the investigation of semiconductor nanostrtlctures such as 2DEGs.

UOW Authors


  •   Xu, Wen (external author)
  •   Lewis, R A.
  •   Koenraad, P M (external author)
  •   Waumans, L R C (external author)
  •   Langerak, C J G M (external author)

Publication Date


  • 2003

Citation


  • Xu, W., Lewis, R. A., Koenraad, P. M., Waumans, L. RC. & Langerak, C. JGM. (2003). Magnetophoton-phonon scattering in two-dimensional electron gases. In M. Das & F. Green (Eds.), Condensed Matter Theories (pp. 373-382). New York: Nova Science Publishers.

Book Title


  • Condensed Matter Theories

Start Page


  • 373

End Page


  • 382