Stuttgart 2012 – scientific programme

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A: Fachverband Atomphysik

A 44: Attosecond physics II

A 44.1: Invited Talk

Friday, March 16, 2012, 10:30–11:00, V57.05

Attosecond control and tracing of collective electron dynamics in nanoparticles — •Matthias Kling — Max-Planck Institut für Quantenoptik, Garching, Germany

Collective electron motion can unfold on attosecond time scales in nanoplasmonic systems, as defined by the inverse spectral bandwidth of the plasmonic resonant region. Similarly, in dielectrics or semiconductors, the laser-driven collective motion of electrons can occur on this characteristic time scale. One of the most promising routes to the realization of electronics operating at Petahertz frequencies arises from applying waveform controlled fields to nanoscale systems, where the nanolocalized near-fields enable for ultimate temporal and spatial control of the relevant electron transport processes. We demonstrate the emission and directional control of highly energetic electrons from isolated nanoparticles in few-cycle laser fields with well defined light waveform. Comparison of the obtained electron momentum distributions to results from quasi-classical simulations indicates that the electron acceleration mechanism is based on rescattering in the enhanced near-field of the nanoparticles. Attosecond nanoplasmonic streaking as one of the potential methods to map the near-fields of isolated nanoparticles in the presence of a strong external driving field will be introduced and discussed.