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Nonlinear optical rectification in cubical quantum dots

✍ Scribed by Zhi-Hai Zhang; Kang-Xian Guo; Bin Chen; Rui-Zhen Wang; Min-Wu Kang

Publisher
Elsevier Science
Year
2009
Tongue
English
Weight
366 KB
Volume
404
Category
Article
ISSN
0921-4526

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✦ Synopsis

The optical rectification (OR) coefficient for cubical quantum dots (CQDs), with an applied electric field is theoretically investigated in the framework of the compact-density-matrix approach and an iterative method. The confined wave functions and energies of electrons in the CQDs are calculated in the effective-mass approximation. Numerical calculations are presented for typical GaAs/AlAs CQDs. The results show that the calculation for OR coefficient in the CQDs system can reach a magnitude of 10 Γ€4 m=V, two orders higher than that in the spherical quantum dots system. The OR coefficient strongly depends on the length of CQDs and the magnitude of electric field. And the peak shifts to the aspect of high energy when considering the electric field.

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