Linear and nonlinear intersubband optical absorption in a disk-shaped quantum dot with a parabolic potential plus an inverse squared potential in a static magnetic field |
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Authors: | Guanghui Liu Kangxian Guo Chao Wang |
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Affiliation: | 1. Department of Physics, College of Physics and Electronic Engineering, Guangzhou University, Guangzhou 510006, PR China;2. Institute of Public Administration, Guangzhou University, Guangzhou 510006, PR China |
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Abstract: | The linear and nonlinear optical absorption in a disk-shaped quantum dot (DSQD) with parabolic potential plus an inverse squared potential in the presence of a static magnetic field are theoretically investigated within the framework of the compact-density-matrix approach and iterative method. The energy levels and the wave functions of an electron in the DSQD are obtained by using the effective mass approximation. Numerical calculations are presented for typical GaAs/AlAs DSQD. It is found that the optical absorption coefficients are strongly affected not only by a static magnetic field, but also by the strength of external field, the confinement frequency and the incident optical intensity. |
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Keywords: | Quantum dots Optical absorption Magnetic field |
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