Excitation dynamics in a three-quantum dot system driven by optical near-field interaction: towards a nanometric photonic device.
Using density operator formalism, we discuss interdot excitation energy transfer dynamics driven by the optical near-field and phonon bath reservoir, as well as coherent excitation dynamics of a quantum dot system. As an effective interaction between quantum dots induced by the optical near-field, the projection operator method gives a renormalized dipole interaction, which is expressed as a sum of the Yukawa functions and is used as the optical near-field coupling of quantum dots. We examine one- and two-exciton dynamics of a three-quantum dot system suggesting a nanometric photonic switch, and numerically obtain a transfer time comparable with the recent experimental results for CuCl quantum dots.
Kobayashi
K
K
ERATO Localized Photon Project, Japan Science and Technology, 687-1 Tsuruma, Machida-shi, Tokyo 194-0004, Japan. kkoba@ohtsu.jst.go.jp
Sangu
S
S
Shojiguchi
A
A
Kawazoe
T
T
Kitahara
K
K
Ohtsu
M
M