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- W2034758810 abstract "Multiphoton exciton transitions induced by an intense optical wave in a semiconductor superlattice are analysed. It is assumed that the excitons can be treated as two-dimensional (2D) excitons localized in the heteroplanes and that the oscillating electric field of the optical wave is directed perpendicular to the heteroplanes. The superlattice potential barriers are modelled by a periodic chain of delta -type functions. Quasienergetic time-dependent states are used. The explicit dependence of the coefficient of the multiphoton absorption on the frequency and magnitude of the optical wave and on the superlattice and exciton parameters is obtained. The exciton absorption spectrum is shown to consist of a series of continuous absorption bands associated with the discrete levels of the exciton. The width of each band is equal to the sum of the widths of the electron and hole minibands. The distance between the neighbouring bands is equal to the separation of the exciton levels. The form of the exciton absorption essentially depends upon the parity of the number of absorbed photons and on the relationship between the separation of the exciton levels and the total width of the electron and hole minibands." @default.
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- W2034758810 date "1994-11-14" @default.
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- W2034758810 title "Multiphoton 2D exciton absorption in a superlattice" @default.
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- W2034758810 doi "https://doi.org/10.1088/0953-8984/6/46/017" @default.
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