Kinetics of Intersubband Optical Excitation and Photoinduced Electron Transfer in an Asymmetric Double Quantum Well

Abstract

Optical excitation of electrons in an asymmetric double quantum well is theoretically examined. The well is biased to align the excited levels and permit resonant electron tunneling. Emphasis is made on the photoinduced transfer of electrons counter to the bias electric field force. Systems with a weak polarization relaxation (dephasing), are studied using the conventional technique of the Schrodinger equation. A density matrix approach is developed to describe optical excitations in the presence of an arbitrary dephasing. Quantum beats, which follow a short-pulse excitation of the double well, are shown to crucially depend on the dephasing. The excitation profiles obtained for cases of different dephasing reveal the full range of tunneling coupling between the wells from completely coherent to incoherent (stepwise).

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1992
Accession Number
ADA244139

Entities

People

  • Lakshmi N. Pandey
  • Leonid S. Muratov
  • Mark I Stockman
  • Thomas F. George

Organizations

  • Washington State University

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Electric Fields
  • Electromagnetic Fields
  • Electromagnetic Radiation
  • Electron Density
  • Electron Energy
  • Electron Gas
  • Electrons
  • Energy Bands
  • Energy Levels
  • Equations
  • Ground State
  • Quantum Beats
  • Quantum Tunneling
  • Quantum Yields
  • Radiation
  • Wave Functions

Fields of Study

  • Physics

Readers

  • Quantum Dot Semiconductor Device Photonics and Graphene Optoelectronic Materials and THz Physics.
  • Quantum spin resonance or Electron Paramagnetic Resonance spectroscopy.

Technology Areas

  • Microelectronics
  • Quantum Computing
  • Quantum Science - Quantum Dots