| Original Articles |
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Optical Conductivity of Anisotropic Quantum Dots in Magnetic Fields |
| GUO Kang-Xian;CHEN Chuan-Yu |
| Department of Physics, Guangzhou University, Guangzhou 510405 |
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| Cite this article: |
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GUO Kang-Xian, CHEN Chuan-Yu 2005 Chin. Phys. Lett. 22 191-194 |
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Abstract Optical conductivity of anisotropic double-parabolic quantum dots is investigated with the memory-function approach, and the analytic expression for the optical conductivity is derived. With characteristic parameters pertaining to GaAs, the numerical results are presented. It is shown that: (1) the larger the optical phonon frequency ωLO, the stronger the peak intensity of the optical conductivity, and the more asymmetric the shape of the optical conductivity; (2) the magnetic field enhances the optical conductivity for levels l=0 and l=1, with or without electron--LO--phonon interactions; (3) the larger the quantum dot thickness lz, the smaller the optical conductivity σ(ω).
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| Keywords:
74.25.Gz
78.67.Hc
74.25.Ha
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Published: 01 January 2005
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| PACS: |
74.25.Gz
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(Optical properties)
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78.67.Hc
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(Quantum dots)
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74.25.Ha
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(Magnetic properties including vortex structures and related phenomena)
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