Single-electron spin resonance in a g-factor-controlled semiconductor quantum dot

Takeshi Kutsuwa, Makoto Kuwahara, Keiji Ono, Hideo Kosaka

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We demonstrate that a single electron spin in a quantum dot, of which g-factor is tuned to nearly zero, is coherently manipulated by the local gate operation. A nearly zero electron g-factor is essential for the quantum state transfer from a photon to an electron spin and ideal for long electron spin memory. The g-factor was tuned by replacing the single heterostructure, which forms the conventional quantum dot, into a single quantum well with a proper electron confinement. The obtained electron g-factor was about 0.05, which is consistent with the optically estimated g-factor. We also demonstrate that the Rabi oscillation was maintained for more than 1.5 μs.

Original languageEnglish
Pages (from-to)821-824
Number of pages4
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume42
Issue number4
DOIs
Publication statusPublished - 2010 Feb 1

Keywords

  • Electron spin
  • Electron spin resonance
  • Quantum dots
  • Quantum well

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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