Dresden 2014 – wissenschaftliches Programm

Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

TT: Fachverband Tiefe Temperaturen

TT 5: Transport: Quantum Coherence and Quantum Information Systems - Experiment

TT 5.5: Vortrag

Montag, 31. März 2014, 10:30–10:45, HSZ 204

Nuclear Spin Polarization in Bulk ZnSe:F — •Fabian Heisterkamp¹, Eugeny A. Zhukov¹, Vladimir L. Korenev², Alex Greilich¹, Alexander Pawlis³, Dmitri R. Yakovlev^1,2, and Manfred Bayer¹ — ¹Experimentelle Physik 2, Technische Universität Dortmund, 44221 Dortmund, Germany — ²Ioffe Physical-Technical Institute, Russian Academy of Sciences, 194021 St. Petersburg, Russia — ³Department Physik, Universität Paderborn, 33098 Paderborn, Germany

Fluorine donor in ZnSe has been considered as a promising candidate for a quantum bit [1]. It is therefore crucial to study the influence of the environment on the spin coherence. In particular, we perform a study of interaction between electron and nuclei spins. Using the time-resolved optical pump-probe spectroscopy in the regime of resonant spin amplification we are able to resolve nuclear magnetic resonances (NMR) of ⁷⁷Zn and ⁶⁷Se isotopes with non-zero spin. The effective nuclei fields show a dispersive form of its strength around NMR as a function of magnetic field. Dependences of that signal are measured as a function of external parameters, like: pump power, polarization modulation frequency and temperature. Theoretical considerations support our findings.

[1] Sanaka et al., Phys. Rev. Lett. 103, 053601 (2009).