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O: Fachverband Oberflächenphysik

O 37: Plasmonics and Nanooptics V: Light-Matter Interaction

O 37.7: Vortrag

Dienstag, 21. März 2017, 15:30–15:45, TRE Ma

Relaxation dynamics of plasmonic hot-carriers in gold nanoparticles — •Emanuele Minutella^{1, 2}, Florian Schulz¹, and Holger Lange^{1, 2} — ¹Physikalische Chemie, Universität Hamburg, Germany — ²The Hamburg Centre for Ultrafast Imaging, CUI

Using light to drive or control chemical or physical processes is a very interesting field of research. One problem is to guide the light's energy to the specific place where reaction takes place. Due to their plasmonic properties noble metal nanoparticles have the ability to collect very efficiency photons and convert them into hot-electron-hole-pairs. As a result of size and photon energy dependent transient absorption measurements we found a binary kinetic for the relaxation times of the hot electrons. Depending on the photon energy either interband or intraband excitations are possible. We found faster decay rates for the intraband relaxation than for the interband. These results can help to improve possible hot-carrier devices.