Dresden 2009 – wissenschaftliches Programm
Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
O: Fachverband Oberflächenphysik
O 20: Nano-optics of metallic and semiconducting nanostructures (time resolved)
O 20.1: Vortrag
Dienstag, 24. März 2009, 10:30–10:45, SCH A216
Analytic solution to optimal control of plasmon propagation in nanostructures — •Philip Tuchscherer1, Christian Rewitz1, Dmitri V. Voronine1, F. Javier García de Abajo2, Walter Pfeiffer3, and Tobias Brixner1 — 1Institut für Physikalische Chemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany — 2Instituto de Optica, CSIC, Serrano 121, 28006 Madrid, Spain — 3Fakultät für Physik, Universität Bielefeld, Universitätsstr. 25, 33516 Bielefeld, Germany
Localization and adaptive control of optical near-fields using polarization-shaped laser pulses have previously been demonstrated theoretically and experimentally. Spatial localization and ultrafast switching of near-fields has a wide range of potential applications such as space-time resolved ’nano-femto’ spectroscopy, quantum information processing, and nanoplasmonic devices.
We have now found an analytic solution to the problem of optimal control of plasmon propagation direction. The contrast between energy deposition at two particular locations within a nanostructure array can be manipulated with amplitude and polarization-shaped laser pulses.
Optimal fields from this deterministic approach are found to agree well with those from evolutionary optimization. Apart from the contrast of local energy deposition, nonlinear signals are also controlled by compressing the near fields at the desired site.
The analytic approach gives insight into the mechanisms involved and presents a way to simplify and improve experiments.