skip to main content

SciTech ConnectSciTech Connect

Title: Controlled exciton transfer between quantum dots with acoustic phonons taken into account

A system of excitons in two quantum dots coupled by the dipole–dipole interaction is investigated. The excitation transfer process controlled by the optical Stark effect at nonresonant frequencies is considered and the effect of the interaction between excitons and acoustic phonons in a medium on this process is taken into account. The system evolution is described using quantum Heisenberg equations. A truncated set of equations is obtained and the transfer dynamics is numerically simulated. High-efficiency picosecond switching of the excitation transfer by a laser pulse with a rectangular envelope is demonstrated. The dependence of picosecond switching on the quantum-dot parameters and optical-pulse length is presented.
Authors:
 [1]
  1. Voronezh State University of Architecture and Civil Engineering, Laboratory of Physical Research (Russian Federation)
Publication Date:
OSTI Identifier:
22469796
Resource Type:
Journal Article
Resource Relation:
Journal Name: Semiconductors; Journal Volume: 49; Journal Issue: 9; Other Information: Copyright (c) 2015 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 77 NANOSCIENCE AND NANOTECHNOLOGY; COMPUTERIZED SIMULATION; DIPOLES; EXCITATION; EXCITONS; LASER RADIATION; LENGTH; PHONONS; QUANTUM DOTS; STARK EFFECT