Dresden 2017 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe
HL: Fachverband Halbleiterphysik
HL 17: Spintronics II (joined session with TT)
HL 17.2: Vortrag
Montag, 20. März 2017, 15:00–15:15, POT 151
Optical control of a strongly coupled spin-spin system in ZnO — Jan Heye Buß1, Jörg Rudolph1, Thomas A. Wassner2, Martin Eickhoff3, and •Daniel Hägele1 — 1Spektroskopie der kondensierten Materie, Ruhr-Universität Bochum, D-44780 Bochum — 2Walter Schottky Institut, Technische Universität München, D-85748 Garching — 3Justus-Liebig-Universität Gießen, I. Physikalisches Institut, D-35392 Gießen
The electron spin of the indium donor in ZnO couples strongly to the 9/2 nuclear spin of indium providing a non-trivial quantum system that can be optically manipulated and read out. Time-resolved Kerr-rotation measurements show directly a complex beating behavior of the electron spin under the application of an external magnetic field. The beat-structure provides a fingerprint of the 10 nuclear spin levels. We find evidence for an efficient optical pumping of the nuclear spin state via the optically pumped donor electron. A modulated pump pulse polarization reduces the nuclear spin polarization starting at frequencies above 100 kHz reaching zero polarization at 8 MHz. A full quantum mechanical modeling of the system including spin relaxation, optical pumping, and electron hopping exhibits excellent agreement with experiment [1]. Prospects for creating non-classical nuclear spin states will be discussed.
[1] J. H. Buß, J. Rudolph, T. A. Wassner, M. Eickhoff, and D. Hägele, Phys. Rev. B 93, 155204 (2016)