Berlin 2012 – wissenschaftliches Programm
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O: Fachverband Oberflächenphysik
O 40: Focussed session: Coherence and coherent control in nanophotonics and plasmonics I
O 40.6: Vortrag
Mittwoch, 28. März 2012, 12:30–12:45, MA 005
Combining spatiotemporal controlled optical excitations with coherent spectroscopy for coupled quantum dots — •Felix Schlosser1, Mario Schoth1, Sven Burger2, Frank Schmidt2, Andreas Knorr1, Shaul Mukamel3, and Marten Richter1 — 1Institut für Theoretische Physik, Technische Universität Berlin, Germany — 2Zuse-Institut Berlin, Germany — 3Department of Chemistry, University of California, Irvine, USA
Combining pulse shaping techniques for ultrashort laser pulses with nanoplasmonics enables spatiotemporal control of electronic excitations with subwavelength precision [1].
We investigate the quality of different structures to achieve controlled localizations of electric excitations. For one selected setup we present our simulation methods: Field distributions are calculated by a Maxwell solver (JCMsuite) in frequency domain and are composed to simulate time resolved distributions of shaped pulses. The pulse shapes needed to localize the electric field on a nanometer scale are found using a genetic algorithm [2].
We take advantage of this method to examine the excited states of coupled quantum dots: Extending a coherent spectroscopy method [3] (double quantum coherence) by the additional spatial control reveals more information about the system than without spatial control.
[1] M. Aeschlimann et al., Nature 446 (7133), 301-304 (2007)
[2] M. Reichelt and T. Meier, Opt. Lett. 34 (19), 2900-2902 (2009)
[3] L. Yang and S. Mukamel, Phys. Rev. Lett. 100, 057402 (2008)