Phys. Rev. B 69, 205303 (2004) [5 pages]Optical detection of single-electron spin decoherence in a quantum dotReceived 27 February 2004; published 4 May 2004 We propose a method based on optically detected magnetic resonance (ODMR) to measure the decoherence time T2 of a single electron spin in a semiconductor quantum dot. The electron spin resonance (ESR) of a single excess electron on a quantum dot is probed by circularly polarized laser excitation. Due to Pauli blocking, optical excitation is only possible for one of the electron-spin states. The photoluminescence is modulated due to the ESR which enables the measurement of electron-spin decoherence. We study different possible schemes for such an ODMR setup. © 2004 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.69.205303
DOI:
10.1103/PhysRevB.69.205303
PACS:
78.67.Hc, 71.35.Pq, 76.70.Hb
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