Abstract
The dynamics of carriers induced by electric fields in semiconductor superlattices has received much interest in recent years. Phenomena like Bloch oscillations and negative differential velocity in these structures have been studied using a variety of experimental techniques [1–5]. One particular point of interest has been the transition of the miniband regime to the Bloch oscillation regime with increasing electric field [6,7]. Cw spectra of strongly-coupled superlattices have evidenced that this transition is concomitant with a rapid field-induced ionization of the zero-field miniband exciton [5,8]. While it has been pointed out from the theoretical side that the field-induced ionization process strongly influences the coherent dynamics in the transition region [9], no systematic experimental investigation of the ionization process has been carried out so far. One interesting question that such an investigation could help to answer is to what extent this ionization process differs from the well-documented case of field-induced exciton ionization in bulk semiconductors.
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© 1996 Plenum Press, New York
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Koch, M. et al. (1996). Field-Induced Exciton Ionization Studied by Four-Wave Mixing. In: Hess, K., Leburton, JP., Ravaioli, U. (eds) Hot Carriers in Semiconductors. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-0401-2_1
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DOI: https://doi.org/10.1007/978-1-4613-0401-2_1
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