Theoretical studies on the optical absorption coefficients and refractive index changes in parabolic quantum dots in the presence of electric and magnetic fields
| Autor: | Bin Chen, Zhi-Hai Zhang, Min-Wu Kang, Shuai Shao, Kangxian Guo, Rui-Zhen Wang |
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| Rok vydání: | 2010 |
| Předmět: |
Density matrix
Materials science business.industry Physics::Optics Condensed Matter::Mesoscopic Systems and Quantum Hall Effect Condensed Matter Physics Molecular physics Magnetic field Nonlinear system Normalized frequency (fiber optics) Optics Quantum dot Electric field Optical intensity General Materials Science Electrical and Electronic Engineering business Refractive index |
| Zdroj: | Superlattices and Microstructures. 47:325-334 |
| ISSN: | 0749-6036 |
| Popis: | The optical absorption coefficients and the changes in the refractive index in GaAs/AlGaAs parabolic quantum dots(QDs) with applied electric and magnetic fields are studied in detail. Analytical expressions for the linear and nonlinear intersubband absorption coefficients and refractive index changes are obtained by using a compact density matrix approach and an iterative procedure. Finally, the calculated results show the incident optical intensity, the frequencies of the confined potential of the QDs and the applied electric and magnetic fields have a great influence on the optical absorption coefficients and refractive index changes in this system. |
| Databáze: | OpenAIRE |
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