Dresden 2009 – scientific programme

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O: Fachverband Oberflächenphysik

O 31: Nano-optics of metallic and semiconducting nanostructures (theory)

O 31.1: Talk

Wednesday, March 25, 2009, 10:30–10:45, SCH A216

Coherent control in hybrid metal-semiconductor nanostructures — Matthias Reichelt and •Torsten Meier — Department Physik, Fakultät für Naturwissenschaften, Universität Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany

Recently it has been shown experimentally that it is possible to coherently control nano-optical excitations by using sophisticated shaped laser pulses. [1] In this work a similar technique is used to theoretically investigate a hybrid nanostructure which consists of a metal aperture and a quantum wire. It is shown that one can concentrate the optically excited electron density at an arbitray position due to wave packet dynamics [2] by chosing particular frequency components and phases of the chirped laser pulse. The optimization process is performed with a genetic algorithm [3] which is linked to a 3D-FDTD solver.
[1] M. Aeschlimann et al., Nature 446, 301 (2007)
[2] T. Meier, P. Thomas, and S.W. Koch Coherent Semiconductor Optics, Springer (2007)
[3] A.E. Eiben and J.E. Smith, Introduction to Evolutionary Computing, Springer (2003)