Rabi oscillation and electron-spin-echo envelope modulation of the photoexcited triplet spin system in silicon

Waseem Akhtar, Takeharu Sekiguchi, Tatsumasa Itahashi, Vasileia Filidou, John J.L. Morton, Leonid Vlasenko, Kohei M. Itoh

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7 Citations (Scopus)


We report on a pulsed electron paramagnetic resonance (EPR) study of the photoexcited triplet state (S=1) of oxygen-vacancy centers in silicon. Rabi oscillations between the triplet sublevels are observed using coherent manipulation with a resonant microwave pulse. The Hahn echo and stimulated echo decay profiles are superimposed with strong modulations known as electron-spin-echo envelope modulation (ESEEM). The ESEEM spectra reveal a weak but anisotropic hyperfine coupling between the triplet electron spin and a 29Si nuclear spin (I=1/2) residing at a nearby lattice site, that cannot be resolved in conventional field-swept EPR spectra.

Original languageEnglish
Article number115206
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number11
Publication statusPublished - 2012 Sep 11


ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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