title: Theoretical study of the time-dependent phenomenon of photon-assisted tunneling through a charged quantum dot.
abstract: 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.
authors.affiliation: Graduate School of Pure and Applied Sciences, University of Tsukuba, Tennodai, Tsukuba, Japan.
authors.forename: Masakazu
authors.initials: M
authors.lastname: Muraguchi
authors.forename: Kenji
authors.initials: K
authors.lastname: Shiraishi
authors.forename: Takuma
authors.initials: T
authors.lastname: Okunishi
authors.forename: Kyozaburo
authors.initials: K
authors.lastname: Takeda