Persistent Optical Nuclear Spin Narrowing in a Singly Charged InAs Quantum Dot

Abstract

We review the investigation of the hole-assisted dynamical nuclear spin polarization mechanism in a singly charged InAs quantum dot. Using coherent dark state spectroscopy, we measure the locking of the Overhauser field to a value determined only by the laser frequencies. Importantly, we review data that the locking effect can suppress nuclear spin fluctuations. We determine the onset time of the nuclear spin narrowing effect and its persistence absent laser interactions by directly measuring the enhancement of the electron spin coherence. This nuclear field locking effect can be explained in terms of an anisotropic hyperfine coupling between the hole spin and the nuclear spins.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2012
Accession Number
ADA579555

Entities

People

  • Allan S. Bracker
  • Bo Sun
  • Daniel Gammon
  • Duncan G. Steel
  • Lu Jeu Sham
  • Xiaodong Xu
  • Yao Wang

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Air Force
  • Fermi Levels
  • Frequency
  • Lasers
  • Magnetic Fields
  • Magnetic Resonance
  • Nuclear Spins
  • Quantum Dots
  • Quantum Properties
  • Resonance
  • Semiconductors
  • Spectra
  • Spectroscopy
  • Spin-Orbit Interaction
  • 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

  • Directed Energy
  • Microelectronics
  • Quantum Computing
  • Quantum Science - Quantum Dots