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Q: Fachverband Quantenoptik und Photonik
Q 46: Quanteneffekte: Lichtstreuung und Ausbreitung
Q 46.4: Talk
Thursday, March 5, 2009, 11:15–11:30, VMP 6 HS-E
Dynamical control of pulse propagation in electromagnetically induced transparency — •Martin Kiffner1,2 and Tarak Nath Dey2,3 — 1Physik-Department, Technische Universität München, D-85748 Garching, Germany — 2Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany — 3Indian Institute of Technology, Guwahati, Guwahati- 781 039, Assam, India
The phenomenon of electromagnetically induced transparency (EIT) gives rise to counterintuitive effects like the slowing and stopping of light and is of great importance, e.g., for the fields of quantum information theory and nonlinear optics [1].
In contrast to the generic EIT setup, we consider a phase modulated control field and demonstrate that this alteration gives rise to periodic changes of the transparency window in frequency space. This feature enables the propagation of probe pulses with disjoint frequency spectra at different times, and thus enhances the potential of EIT media for the purpose of signal processing. For the explanation of our results, we put forward the concept of time-dependent susceptibilites that yields qualitative as well as quantitative agreement with the numerical integration of Maxwell-Bloch equations. Our theoretical model also applies to other systems.
[1] M. Fleischhauer, A. Imamoglu, and J. P. Marangos, Rev. Mod. Phys. 77, 633 (2005).