Ramsay, A. J.Boyle, S. J.Godden, T. M.Kolodka, R. S.Khatab, A. F. A.Oliveira, José Brás Barreto de [UNESP]Skiba-Szymanska, J.Liu, H. -Y.Hopkinson, M.Fox, A. M.Skolnick, M. S.2014-05-202014-05-202009-09-01Solid State Communications. Oxford: Pergamon-Elsevier B.V. Ltd, v. 149, n. 35-36, p. 1458-1465, 2009.0038-1098http://hdl.handle.net/11449/8473A hole spin is a potential solid-state q-bit, that may be more robust against nuclear spin induced dephasing than an electron spin. Here we propose and demonstrate the sequential preparation, control and detection of a single hole spin trapped on a self-assembled InGaAs/GaAs quantum dot. The dot is embedded in a photodiode structure under an applied electric field. Fast, triggered, initialization of a hole spin is achieved by creating a spin-polarized electron-hole pair with a picosecond laser pulse, and in an applied electric field, waiting for the electron to tunnel leaving a spin-polarized hole. Detection of the hole spin with picoseconds time resolution is achieved using a second picosecond laser pulse to probe the positive trion transition, where a trion is created conditional on the hole spin being detected as a change in photocurrent. Finally, using this setup we observe a Rabi rotation of the hole-trion transition that is conditional on the hole spin, which for a pulse area of 2 pi can be used to impart a phase shift of pi between the hole spin states, a non-general manipulation of the hole spin. (C) 2009 Elsevier Ltd. All rights reserved.1458-1465engQuantum dotsSpin dynamicsCoherent controlArtigo10.1016/j.ssc.2009.04.043WOS:000269073200011Acesso restrito6977466698742311