Arup Neogi, Yutaka Takahashi, et al.
IEEE Journal of Quantum Electronics
We have calculated by a variational procedure the excitonic states in symmetric coupled quantum well structures of GaAs/AlGaAs in the presence of an external electric field perpendicular to the interfacial plane using a nonseparable, nonspherical hydrogenic trial wavefunction. The exciton binding energies have been calculated as a function of external electric field for various well and barrier widths. The nonspherical trial wavefunction leads to a better estimate of the exciton binding energy, especially in high electric field, than that calculated with a spherical one. The calculations show that the binding energy is strongly dependent on the external electric fields: the variation (increase or decrease) is related to the spatial distribution of the wavefunctions. The results of the calculation are consistent with our experimental results.
Arup Neogi, Yutaka Takahashi, et al.
IEEE Journal of Quantum Electronics
Kiyoshi Kobayashi, Satoru S. Kano
Optical Review
Yutaka Takahashi, Koji Muraki, et al.
Japanese Journal of Applied Physics
Yoshimine Kato, Yuki Miyoshi, et al.
IEICE Transactions on Electronics