Hamburg 2009 – scientific programme

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A: Fachverband Atomphysik

A 29: Photoionization II

A 29.3: Invited Talk

Thursday, March 5, 2009, 15:00–15:30, VMP 8 R208

Ring molecules as tunable light sources — •Andrey Moskalenko and Jamal Berakdar — Institut für Physik, Martin-Luther-Universität Halle-Wittenberg, Germany

We analyze the emission properties of molecular and nanostructured rings [1] excited by ultrafast light pulses. Application of an appropriate sequence of light pulses allows for the control of the charge polarization dynamics in such driven quantum rings. As a consequence, the spectral and polarization properties of the emitted radiation can be controlled on ultrafast time scales. This we conclude from the theory of the time-dependent spectrum and its generalization to the time-dependent detection of Stokes parameters and the polarization degrees of polychromatic radiations, valid for time scales comparable to the reciprocal of characteristic emission frequencies [2].

[1] A. S. Moskalenko, A. Matos-Abiague, J. Berakdar, Phys. Rev. B 74, 161303(R) (2006); EPL 78, 57001 (2007).
[2] A. S. Moskalenko and J. Berakdar, Phys. Rev. A 78, 051804(R) (2008).