Optical detection of single-electron spin resonance in a quantum dot

Martin Kroner, Kathrina M. Weiss, Benjamin Biedermann, Stefan Seidl, Stephan Manus, Alexander W. Holleitner, Antonio Badolato, Pierre M. Petroff, Brian D. Gerardot, Richard J. Warburton, Khaled Karrai

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)


We demonstrate optically detected spin resonance of a single electron confined to a self-assembled quantum dot. The dot is rendered dark by resonant optical pumping of the spin with a laser. Contrast is restored by applying a radio frequency (rf) magnetic field at the spin resonance. The scheme is sensitive even to rf fields of just a few µT. In one case, the spin resonance behaves as a driven 3-level ? system with weak damping; in another one, the dot exhibits remarkably strong (67% signal recovery) and narrow (0.34 MHz) spin resonances with fluctuating resonant positions, evidence of unusual dynamic processes. © 2008 The American Physical Society.

Original languageEnglish
Article number156803
Pages (from-to)-
Number of pages4
JournalPhysical Review Letters
Issue number15
Publication statusPublished - 18 Apr 2008


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