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.

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