Coherent Control and Polarization Readout of Individual Excitonic States

Langbein, Wolfgang Werner, Patton, B. and Woggon, U. 2005. Coherent Control and Polarization Readout of Individual Excitonic States. Physical Review Letters (PRL) 95 , 266401. 10.1103/PhysRevLett.95.266401

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Abstract

We present measurements and simulations of coherent control and readout of the polarization in individual exciton states. The readout is accomplished by transient four-wave mixing detected by heterodyne spectral interferometry. We observe Rabi oscillations in the polarization, which show half the period of the Rabi oscillations in the population. A decrease of the oscillation amplitude with pulse area is observed, which is not accompanied by a change in the dephasing time. This suggests the transfer of the excitation to other states as the origin of the Rabi-oscillation damping. Detuning of the excitation enables the control of the polarization in phase and amplitude and is in qualitative agreement with simulations for a two-level system. Additionally, simultaneous Rabi flopping of several spatially and energetically close exciton states is demonstrated.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Physical Society
ISSN:	0031-9007
Last Modified:	04 Jun 2017 01:40
URI:	http://orca.cf.ac.uk/id/eprint/1566

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