Regensburg 2013 – wissenschaftliches Programm

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O: Fachverband Oberflächenphysik

O 49: Symposium Quantum Plasmonics (SYQP, jointly with HL, TT)

O 49.1: Hauptvortrag

Mittwoch, 13. März 2013, 15:00–15:30, H1

Quantum plasmonics and applications in light harvesting — •Peter Nordlander — Department of Physics, Rice University, Houston TX 77251, USA

Quantum effects can have a pronounced influence on the on the optical properties of strongly coupled nanoparticles.[1] For closely spaced metallic nanoparticles, electron transfer and nonlocal screening can drastically reduce the electric field enhancements across the gap and result in a Charge Transfer Plasmon (CTP) where an oscillatory electric tunneling current flows between the particles,[2] and strongly nonlinear effects can be induced.[3] The energy of the CTP is found to depend strongly on the electronic structure of the junction and the presence of molecules inside the gap.[4] For the coupled plasmonic-excitonic system where hybrid plexciton states are formed,[5] quantum effects can strongly modify the optical spectrum and a induce highly nonlinear optical response. Another plasmonic quantum mechanical effect is the nonradiative decay of plasmons into hot electron-hole pairs which can induce chemical reactions on the surface of the nanostructure [6] or be harvested directly in photodetector or photovoltaic geometries.[7]

References [1] J. Zuloaga et al., ACS Nano 4(2010)5269 [2] R. Esteban et al., Nat. Comm. 3(2012)825 [3] C. Marinica et al., Nano Lett. 12( 2012)1333 [4] P. Song et al., Phys. Rev. B 86(2012)121410 [5] A. Manjavacas et al., Nano Lett. 11(2011)2318; ACS Nano 6(2012)1724 [6] S. Mukherjee et al., Nano Lett. 13(2013)nl303940z [7] M. W. Knight et al., Science 332(2011)702; Z.Y. Fang et al., Nano Lett. 12(2012)3808