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Nonlinear optical rectification effects in an asymmetric quantum well was investigated. Analytical expression of optical rectification coefficient was deduced by using density-matrix method. The larger optical rectification coefficient can be obtained by choosing an appropriate parameter a. The optical rectification coefficient increases with the enhancement of the asymmetry of the quantum well. The...
Third-order optical nonlinearities in semi-parabolic quantum wells are studied. The third-harmonic generation coefficient is obtained by using compact-density-matrix approach and iterative method, and the numerical results are presented for spical semi-parabolic quantum wells. The very large third-harmonic-generation coefficient is obtained in this semi-parabolic quantum wells and it is over 10 times...
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