Goryca M, Koperski M, Wojnar P, Smoleński T, Kazimierczuk T, Golnik A, Kossacki P
Institute of Experimental Physics, University of Warsaw, ul. Hoża 69, 00-681 Warszawa, Poland.
Institute of Physics, Polish Academy of Sciences, al. Lotników 32/46, 02-688 Warszawa, Poland.
Phys Rev Lett. 2014 Nov 28;113(22):227202. doi: 10.1103/PhysRevLett.113.227202. Epub 2014 Nov 25.
We present direct observation of a coherent spin precession of an individual Mn^{2+} ion, having both electronic and nuclear spins equal to 5/2, embedded in a CdTe quantum dot and placed in a magnetic field. The spin state evolution is probed in a time-resolved pump-probe measurement of absorption of the single dot. The experiment reveals subtle details of the large-spin coherent dynamics, such as nonsinusoidal evolution of states occupation, and beatings caused by the strain-induced differences in energy levels separation. Sensitivity of the large-spin impurity on the crystal strain opens the possibility of using it as a local strain probe.
