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Ultrafast collapse of molecular polaritons in photoswitch-nanoantennas at room temperature
Joel Kuttruff, Marco Romanelli, Esteban Pedrueza-Villalmanzo +8
Molecular polaritons are hybrid light-matter states that emerge when a molecular transition strongly interacts with photons in a resonator. At optical frequencies, this interaction…
Control of excitonic absorption by thickness variation in few-layer GaSe
Arne Budweg, Dinesh Yadav, Alexander Grupp +4
We control the thickness of GaSe on the level of individual layers and study the corresponding optical absorption via highly sensitive differential transmission measurements. Suppr…
Optical Activation of Germanium Plasmonic Antennas in the Mid Infrared
Marco P. Fischer, Christian Schmidt, Emilie Sakat +9
Impulsive interband excitation with femtosecond near-infrared pulses establishes a plasma response in intrinsic germanium structures fabricated on a silicon substrate. This direct…
Ultrafast pseudospin dynamics in graphene
M. Trushin, A. Grupp, G. Soavi +8
Interband optical transitions in graphene are subject to pseudospin selection rules. Impulsive excitation with linearly polarized light generates an anisotropic photocarrier occupa…
Non-equilibrium dynamics of photo-excited electrons in graphene: collinear scattering, Auger processes, and the impact of screening
Andrea Tomadin, Daniele Brida, Giulio Cerullo +2
We present a combined analytical and numerical study of the early stages (sub-100fs) of the non-equilibrium dynamics of photo-excited electrons in graphene. We employ the semiclass…
Ultrafast collinear scattering and carrier multiplication in graphene
D. Brida, A. Tomadin, C. Manzoni +8
Graphene is emerging as a viable alternative to conventional optoelectronic, plasmonic, and nanophotonic materials. The interaction of light with carriers creates an out-of-equilib…