Excitation energy transfer and population dynamics in a quantum dot system induced by optical near-field interaction

Energy transfer and exciton population dynamics in a two-quantum dot system coupled with a phonon heat-bath system are examined using the density matrix formalism. In such a system, optical near-field interactions induce energy transfer between quantum dots, and exciton–phonon interactions guarantee the unidirectional excitation energy transfer. Our theoretical investigation shows that the population dynamics change drastically depending on the coupling strengths due to optical near-field interactions and exciton–phonon heat-bath interactions. The temperature effect promotes frequent energy back-transfer from the heat-bath to the quantum dot system. Applying our theoretical formulation, we numerically calculate the time evolution of populations, and estimate energy transfer time or state-filling time for a CuCl quantum dot system. The estimated time is suitable for the elements in our proposed optical nano-switch and nano-photonic devices.

[1]  A. Holmes,et al.  Interplay of Rabi oscillations and quantum interference in semiconductor quantum dots. , 2002, Physical review letters.

[2]  Y. Masumoto,et al.  Homogeneous Width of Confined Excitons in Quantum Dots at Very Low Temperatures , 2001 .

[3]  Motoichi Ohtsu,et al.  Fabrication of nanometric zinc pattern with photodissociated gas-phase diethylzinc by optical near field , 2000 .

[4]  Nakamura,et al.  Mesoscopic enhancement of optical nonlinearity in CuCl quantum dots: Giant-oscillator-strength effect on confined excitons. , 1993, Physical review. B, Condensed matter.

[5]  B. West,et al.  Statistical properties of quantum systems: The linear oscillator , 1984 .

[6]  Xing Zhu,et al.  Near-Field Optics: Principles and Applications , 2000 .

[7]  Gammon,et al.  Coherent optical control of the quantum state of a single quantum Dot , 1998, Science.

[8]  V. Agranovich,et al.  Electronic excitation energy transfer in condensed matter , 1982 .

[9]  H. Carmichael Statistical Methods in Quantum Optics 1 , 1999 .

[10]  L. J. Sham,et al.  Rabi oscillations of excitons in single quantum dots. , 2001, Physical review letters.

[11]  Y. Masumoto,et al.  Persistent spectral-hole-burning spectroscopy of CuCl quantum cubes , 1997 .

[12]  T. Thirunamachandran,et al.  Molecular Quantum Electrodynamics , 1984 .

[13]  Motoichi Ohtsu,et al.  Fabrication of ZnO nanostructure using near-field optical technology , 1999, Optics & Photonics.

[14]  H. Kamada,et al.  Exciton Rabi oscillation in a single quantum dot. , 2001, Physical review letters.

[15]  M Ohtsu,et al.  Nanometric patterning of zinc by optical near‐field photochemical vapour deposition , 1999, Journal of microscopy.

[16]  J. Hopfield a Quantum-Mechanical Theory of the Contribution of Excitons to the Complex Dielectric Constant of Crystals. , 1958 .

[17]  H. Sumi,et al.  Theory of Rapid Excitation-Energy Transfer from B800 to Optically-Forbidden Exciton States of B850 in the Antenna System LH2 of Photosynthetic Purple Bacteria , 1999 .

[18]  L. Mandel,et al.  Optical Coherence and Quantum Optics , 1995 .

[19]  Kikuo Cho,et al.  Theory of resonant SNOM (scanning near-field optical microscopy): breakdown of the electric dipole selection rule in the reflection mode , 1996 .

[20]  Peter Fulde,et al.  Electron correlations in molecules and solids , 1991 .

[21]  M. Ohtsu,et al.  Nanofabrication and atom manipulation by optical near-field and relevant quantum optical theory , 2000, Proceedings of the IEEE.

[22]  M Ohtsu,et al.  Quantum theoretical approach to a near‐field optical system , 1999, Journal of microscopy.

[23]  Motoichi Ohtsu Near-field nano-optics toward nano/atom deposition , 1999, Other Conferences.

[24]  Motoichi Ohtsu,et al.  Near-field optical potential for a neutral atom , 2000 .

[25]  M. Ohtsu,et al.  Direct observation of optically forbidden energy transfer between CuCl quantum cubes via near-field optical spectroscopy. , 2002, Physical review letters.