Coherent Control and Polarization Readout of Individual Excitonic States

Langbein, Wolfgang Werner ORCID: https://orcid.org/0000-0001-9786-1023, 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:	06 May 2023 04:30
URI:	https://orca.cardiff.ac.uk/id/eprint/1566

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