Hamburg 2009 – wissenschaftliches Programm

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MO: Fachverband Molekülphysik

MO 5: Quantenkontrolle 1

MO 5.7: Vortrag

Montag, 2. März 2009, 15:30–15:45, VMP 6 HS-G

Simultaneous spatial and temporal control of optical near-fields at metal nanostructures — Martin Aeschlimann¹, Michael Bauer², Daniela Bayer¹, Tobias Brixner³, Stefan Cunovic⁴, •Frank Dimler³, Alexander Fischer¹, F. Javier García de Abajo⁵, Viktor Myroshnychenko⁵, Walter Pfeiffer⁴, Martin Rohmer¹, Christian Schneider¹, Felix Steeb¹, Christian Strüber⁴, and Dmitri V. Voronine³ — ¹TU Kaiserslautern, Kaiserslautern, Germany — ²Universität Kiel, Kiel, Germany — ³Universität Würzburg, Würzburg, Germany — ⁴Universität Bielefeld, Bielefeld, Germany — ⁵Consejo Superior de Investigaciones Cientificas, Madrid, Spain

Expanding the recently demonstrated adaptive control of optical near-fields [1] we investigate the temporal evolution of the local electronic excitation of nanostructures by spatially resolved cross correlation measurements using two-photon photoemission electron microscopy. Planar silver nanostructures manufactured by e-beam lithography are excited by polarization shaped pump pulses and the corresponding local excitation is probed by a time-delayed circularly polarized laser pulse. The experiments confirm that the polarization-shaped incident laser pulse does indeed switch between two distinct excitation patterns within a time scale that is only limited by the pulse duration of the laser system. First spatio-temporal control experiments show simultaneous subpicosecond and subwavelength resolution.

[1] M. Aeschlimann, et al.; Nature 446, 301 (2007).