Regensburg 2010 – wissenschaftliches Programm

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DS: Fachverband Dünne Schichten

DS 40: [O] Plasmonics and Nanooptics V (Joint Session DS/O/HL)

DS 40.9: Vortrag

Donnerstag, 25. März 2010, 12:30–12:45, H32

Optimally Shaped Laser Pulses for Hybrid Metal-Semiconductor Nanostructures — •Matthias Reichelt¹, Torsten Meier¹, Andrea Walther², and Michael Dellnitz² — ¹Department Physik, Universität Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany — ²Institut für Mathematik, Universität Paderborn, Warburger Str. 100, D-33098 Paderborn, Germany

A hybrid nanostructure which consists of a metal aperture and a semiconductor quantum wire is studied theoretically. [1] It is shown that one can concentrate the optically excited electron density at an arbitray position for a given time using sophistically shaped laser pulses. To obtain the optimized laser field a genetic algorithm [2] and a more rigorous mathematical approach [3] are applied. Full three-dimensional finite-difference time-domain calculations [4] confirm the predicted spatiotemporal control.
[1] M. Reichelt and T. Meier, Opt. Lett. 34, 2900 (2009).
[2] A.E. Eiben and J.E. Smith, Introduction to Evolutionary Computing, Springer (2003)
[3] S. Sertl and M. Dellnitz, Journal of Global Optimization 34, 569-587, (2006).
[4] A. Taflove, Advances in Computational Electrodynamics, Artech House, (1998).