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  • Conference proceedings  (2)
  • PACS. 71.35.Cc Intrinsic properties of excitons; optical absorption spectra - 42.50.Md Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency - 78.66.-w Optical properties of specific thin films, surfaces, and low-dimensional structures: superlattices, quantum well structures, multilayers, and microparticles  (1)
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  • 1
    Electronic Resource
    Electronic Resource
    Linear and non-linear optical properties of semiconductor superlattices: Excitonic and field-induced effects (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 1693-1697 
    Details
    ISSN: 0392-6737
    Keywords: High-field and nonlinear effects ; Theory of electronic transport ; scattering mechanism ; Ultrafast optical techniques ; Optical properties of thin films, surfaces and layer structures (superlattices, heterojunctions, and multilayers) ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary The effective dimensionality of excitons can be drastically changed by applying an alternating electric field. On the basis of a full three-dimensional description of both coherent and incoherent phenomena in anisotropic structures it is found that appropriate applied oscillating fields change the exciton wave function from anisotropic three dimensional to basically two dimensional. This effective-dimension change is caused by dynamic localization which leads to an increase of the exciton binding energy and of the corresponding oscillator strength.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457265
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  • 2
    Electronic Resource
    Electronic Resource
    Electric-field-induced exciton ionization in a GaAs/AlGaAs superlattice (1995)
    Springer
    Il nuovo cimento della Società Italiana di Fisica 17 (1995), S. 1759-1762 
    Details
    ISSN: 0392-6737
    Keywords: Optical transient phenomena (including quantum beats, dephasings and revivals, photon echoes, free induction decay, and optical mutation) ; Excitons and related phenomena (including electron-hole drops) ; Time-resolved optical spectroscopies and other ultrafast optical measurements in condensed matter ; Optical properties of thin films, surfaces and thin layer structures (including superlattices, heterostructures, and intercalation compounds) ; Conference proceedings
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Summary We study exciton ionization induced by an axial electric field in a strongly coupled GaAs/Al0.3 Ga0.7 As superlattice at low temperatures. The field-induced ionization times of the heavy-hole 1s exciton in the miniband field regime are determined from transient four-wave-mixing experiments and theoretical model calculations. They are found to lie between the field ionization times of excitons in bulk semiconductors, and in strongly confined quantum well systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02457276
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  • 3
    Electronic Resource
    Electronic Resource
    Influence of carrier correlations on the excitonic optical response including disorder and microcavity effects (1999)
    Springer
    The European physical journal 11 (1999), S. 407-421 
    Details
    ISSN: 1434-6036
    Keywords: PACS. 71.35.Cc Intrinsic properties of excitons; optical absorption spectra - 42.50.Md Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency - 78.66.-w Optical properties of specific thin films, surfaces, and low-dimensional structures: superlattices, quantum well structures, multilayers, and microparticles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract: A model study of the characteristic signatures of carrier-correlation effects on the excitonic differential absorption spectra in semiconductors is presented. Using an effectively one-dimensional tight-binding system Coulomb-induced carrier-correlations up to third-order in the optical field are treated without additional approximations. To illustrate the influence of the different many-body contributions excitonic differential absorption spectra are computed for various polarizations and pump-probe time delays. The simultaneous influence of energetic disorder and correlations on the differential absorption spectra is discussed. Also presented are numerical results for the case when the semiconductor system is placed inside a microcavity in the strong-coupling regime. It is shown that the correlations induce characteristic signatures in the normal mode spectra.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1088/0953-8984/11/37/101
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