Dynamics of quantum dot nuclear spin polarization controlled by a single electron

Maletinsky, P., Badolato, A. and Imamoglu, A. (2007) Dynamics of quantum dot nuclear spin polarization controlled by a single electron. Physical Review Letters, 99(5), 056804. (doi: 10.1103/PhysRevLett.99.056804)

Abstract

We present measurements of the buildup and decay of nuclear spin polarization in a single semiconductor quantum dot. Our experiment shows that we polarize the nuclei in a few milliseconds, while their decay dynamics depends drastically on external parameters. We show that a single electron can very efficiently depolarize nuclear spins in milliseconds whereas in the absence of the electron the nuclear spin lifetime is on the scale of seconds. This lifetime is further enhanced by 1–2 orders of magnitude by quenching the nonsecular nuclear dipole-dipole interactions with a magnetic field of 1 mT.

• Item Type: Articles
• Status: Published
• Refereed: Yes
• Glasgow Author(s) Enlighten ID: Badolato, Professor Antonio
• Authors: Maletinsky, P., Badolato, A., and Imamoglu, A.
• College/School: College of Science and Engineering > School of Engineering > Electronics and Nanoscale Engineering
• Journal Name: Physical Review Letters
• Publisher: American Physical Society
• ISSN: 0031-9007
• ISSN (Online): 1079-7114
• Published Online: 02 August 2007