Simulation of Plasmonic Nanoparticles - Project 06

Project Leader: Ulrich Hohenester

This project extends concepts of cavity-QED to hybrid systems consisting of plasmonic nanoparticles and quantum emitters, such as semiconductor nanocrystals or NV centers in nanodiamands (together with the Krenn and Majer groups), and explores possible routes towards lightwave electronics through ultrafast photoexcitation of electrons in the strong, evanescent SP fields (together with the Burgdörfer group). Plasmonic nanoparticles modify the photonic environment, and allow for tailoring the decay and energy transfer properties of quantum emitters [Nie97, Andrew04, Anger06, Akimov07].

Contrary to natural atoms, which can be modeled as generic two-level systems, artificial atoms possess a more complex level structure and are embedded in a solid state environment, which might be of importance for SP-based quantum control, hybrid nanostructures, or active plasmonics. The SP-induced field enhancement in presence of femtosecond laser pulses can be exploited for hot-electron generation, as recently demonstrated for metal tips [Krüger11, Herink12]. Expanding this scheme to more complex, lithographically grown objects allows to tailor the evanescent SP-fields and the ponderomotive acceleration of hot electrons, which might beneficial for lightwave electronics applications, as well as generation of terahertz and higher harmonic radiation.

Within the SFB there will be a direct cooperation with the Krenn group on the coupling between quantum dots and plasmonic nanoparticle. The investigation of strong-field effects of electrons in presence of SP-enhanced fields of an ultrafast laser pulse will be carried out in collaboration with the Burgdörfer group.

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