Abstract
The ionization of impurity centers in a semiconductor superlattice by nonlinear electromagnetic waves, which are the most general solution of the sine-Gordon equation and can be expressed in terms of the Jacobi elliptic functions, is investigated. The problem is solved in a quasiclassical approximation for arbitrary ratio of V (depth of the impurity energy level) and Δ (half-width of the conduction miniband). Results in agreement with those for solitary waves and sinusoidal (linear) electromagnetic waves are obtained in limiting cases. The effect of a uniform high-frequency electric field on the processes leading to the ionization of impurities by solitary waves is also investigated.
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