Magnetoabsorption spectra of magnetoexciton transitions in GaAs/Ga_(0.7)Al_(0.3)As quantum wells

• 作 者: 米贤武 李德俊 孟凡斌 赵鹤平
• 机 构: College of Physics Science and Information Engineering,Jishou University,
• 出 处: Chinese Optics Letters
• 发表日期: 2009年04期
• 关键词: transitions exciton terahertz confined Al polarized variational polynomial envel

The internal transitions and absorption spectra of confined magnetoexcitons in GaAs/Ga_(0.7)Al_(0.3)As quantumwells have been theoretically investigated under magnetic fields along the growth direction of thesemiconductor heterostructure.The magnetoexciton states are obtained within the effective-mass approximationby using a variational procedure.The trial exciton-envelope wavefunctions are described ashydrogeniclike polynomial functions.The internal transition energies are investigated by studying theallowed magnetoexcitonic transitions using terahertz radiation circularly polarized in the plane of thequantum well.The intraexcitonic magnetoabsorption coefficients are obtained for transitions from 1s-liketo 2p~±-like magnetoexciton states as functions of the applied magnetic field.

The internal transitions and absorption spectra of confined magnetoexcitons in GaAs / Ga 0.7 Al 0.3 As quantumwells have been theoretically investigated under magnetic fields along the growth direction of these semiconductor heterostructure. The magnetoexciton states are within the effective mass approximation by using a variational procedure. The trial exciton-envelope wavefunctions are described ashydrogeniclike polynomial functions. The internal transition energies are investigated by studying theallowed magnetoexcitonic transitions using terahertz radiation circularly polarized in the plane of thequantum well.The intraexcitonic magnetoabsorption coefficients are obtained for transitions from 1s-liketo 2p ~ ± -like magnetoexciton states as functions of the applied magnetic field.