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Probing single-electron spin decoherence in quantum dots using charged excitons

Gywat, O. and Engel, H. A. and Loss, D.. (2005) Probing single-electron spin decoherence in quantum dots using charged excitons. Journal of Superconductivity, 18 (2). pp. 175-183.

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Official URL: http://edoc.unibas.ch/dok/A5254664

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Abstract

We propose to use optical detection of magnetic resonance (ODMR) to measure the decoherence time T-2 of a single-electron spin in a semiconductor quantum dot. The electron is in one of the spin 1/2 states and a circularly polarized laser can only create an optical excitation for one of the electron spin states due to Pauli blocking. An applied electron spin resonance (ESR) field leads to Rabi spin flips and thus to a modulation of the photoluminescence or, alternatively, of the photocurrent. This allows one to measure the ESR linewidth and the coherent Rabi oscillations, from which the electron spin decoherence can be determined. We study different possible schemes for such an ODMR setup, including cw or pulsed laser excitation.
Faculties and Departments:05 Faculty of Science > Departement Physik > Physik > Theoretische Physik Mesoscopics (Loss)
UniBasel Contributors:Loss, Daniel
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Springer
ISSN:0896-1107
e-ISSN:1572-9605
Note:Publication type according to Uni Basel Research Database: Journal article
Identification Number:
Last Modified:30 Jan 2017 09:38
Deposited On:22 Mar 2012 13:58

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