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Investigation of electronic coupling in semiconductor double quantum wells using coherent optical two-dimensional Fourier transform spectroscopy

Authors
Journal
Solid State Communications
0038-1098
Publisher
Elsevier
Publication Date
Volume
149
Identifiers
DOI: 10.1016/j.ssc.2008.12.021
Keywords
  • A. Semiconductors
  • A. Quantum Wells
  • D. Optical Properties
  • E. Nonlinear Optics
Disciplines
  • Physics

Abstract

Abstract We investigate electronic coupling in asymmetric semiconductor double quantum wells using a new spectroscopy method, optical two-dimensional Fourier transform (2D-FT) spectroscopy. Measurements on two samples with different barrier thicknesses show drastically different 2D-FT spectra. We compare these measurements to conventional one-dimensional four-wave-mixing measurements, highlighting the unique advantages of the 2D-FT spectroscopy. An oscillatory behavior in the intensity of the cross peaks as a function of the mixing time is observed. This oscillation is attributed to interference between different quantum mechanical pathways, and its features are determined by the non-radiative Raman coherence between dipole-forbidden states.

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