Detection of local electron and nuclear spin dynamics by time-resolved Kerr microscopy

S. Matsuzaka, Y. Ohno, H. Ohno

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We implement time-resolved Kerr microscopy (TRKM) system with ∼1μm spatial resolution for observation of coupled electronnuclear spin dynamics such as dynamic nuclear polarization (DNP) in a local area of the laser spot. From TRKM measurements, Larmor precession of electron spins injected by right (σ) or left (σ-) circular polarized pump pulse is detected. The difference of the precession frequencies between σ and σ- pumping corresponds to the polarization-dependent nuclear magnetic field caused by DNP. This indicates that we successfully detect coupled electronnuclear spin dynamics in a local area of the laser spot size of ∼1.5×1.5μm2. Furthermore, we show the pump and probe power dependences of DNP in high optical intensity region. All-optical NMR is also demonstrated at arbitrary frequencies by controlling acousto-optical modulator.

Original languageEnglish
Pages (from-to)2702-2706
Number of pages5
JournalPhysica E: Low-Dimensional Systems and Nanostructures
Volume42
Issue number10
DOIs
Publication statusPublished - 2010 Sep 1

ASJC Scopus subject areas

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

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