Muraguchi Masakazu, Shiraishi Kenji, Okunishi Takuma, Takeda Kyozaburo
Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba, Japan.
J Phys Condens Matter. 2009 Feb 11;21(6):064230. doi: 10.1088/0953-8984/21/6/064230. Epub 2009 Jan 20.
We have studied numerically the time-dependent photon-assisted tunneling (TD-PAT) process for electrons confined in quantum dots (QDs) by employing the finite difference method under the scheme of the TD-density functional theory (DFT). We have found the quasi-dark state (quasi-DS), where the injected electron remains in the QD. By varying the barrier thickness, we have calculated the TD profile of the electron density in a QD, and found the optimal geometry of the lozenge QD. We have also discussed how the charged QD modulates the PAT process.
