title: High resolution coherent population trapping on a single hole spin in a semiconductor quantum dot.
abstract: We report high resolution coherent population trapping on a single hole spin in a semiconductor quantum dot. The absorption dip signifying the formation of a dark state exhibits an atomic physicslike dip width of just 10 MHz. We observe fluctuations in the absolute frequency of the absorption dip, evidence of very slow spin dephasing. We identify the cause of this process as charge noise by, first, demonstrating that the hole spin g factor in this configuration (in-plane magnetic field) is strongly dependent on the vertical electric field, and second, by characterizing the charge noise through its effects on the optical transition frequency. An important conclusion is that charge noise is an important hole spin dephasing process.
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH 4056 Basel, Switzerland and Institut Lumière Matière (ILM), UMR5306 Université Lyon 1/CNRS, Université de Lyon, 69622 Villeurbanne Cedex, France.
authors.forename: Julien
authors.initials: J
authors.lastname: Houel
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH 4056 Basel, Switzerland.
authors.forename: Jonathan H
authors.initials: JH
authors.lastname: Prechtel
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH 4056 Basel, Switzerland.
authors.forename: Andreas V
authors.initials: AV
authors.lastname: Kuhlmann
authors.affiliation: Instituto de Fisica Interdisciplinar y Sistemas Complejos, IFISC (UIB-CSIC), Campus Universitat de les Illes Balears, Palma de Mallorca E-07122, Spain.
authors.forename: Daniel
authors.initials: D
authors.lastname: Brunner
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
authors.forename: Christopher E
authors.initials: CE
authors.lastname: Kuklewicz
authors.affiliation: SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh EH14 4AS, United Kingdom.
authors.forename: Brian D
authors.initials: BD
authors.lastname: Gerardot
authors.affiliation: Materials Department, University of California, Santa Barbara, California 93106, USA.
authors.forename: Nick G
authors.initials: NG
authors.lastname: Stoltz
authors.affiliation: Materials Department, University of California, Santa Barbara, California 93106, USA.
authors.forename: Pierre M
authors.initials: PM
authors.lastname: Petroff
authors.affiliation: Department of Physics, University of Basel, Klingelbergstrasse 82, CH 4056 Basel, Switzerland.
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Warburton