Details

Autor(en) / Beteiligte

• Maletinsky, P
• Badolato, A
• Imamoglu, A

Titel

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

Ist Teil von

• Physical review letters, 2007-08, Vol.99 (5), p.056804-056804, Article 056804

Ort / Verlag

United States

Erscheinungsjahr

2007

Quelle

American Physical Society

Beschreibungen/Notizen

• 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.