80 citations · 101 across the 4 of their papers we have counts for
4 papers · 1 filter
Equivalence of reflection paths of light and Feynman paths in stacked metasurfaces
Jan Sperrhake, Matthias Falkner, Stefan Fasold +2
We show the existence of virtual polarization states during the interaction of modes in metasurface stacks. In support of our findings we experimentally realize a metasurface stack…
Characterization of a circular optical nanoantenna by nonlinear photoemission electron microscopy
Thomas Kaiser, Matthias Falkner, Jing Qi +5
We report on the investigation of an advanced circular plasmonic nanoantenna under ultrafast excitation using nonlinear photoemission electron microscopy (PEEM) under near-normal i…
Impedance generalization for plasmonic waveguides beyond the lumped circuit model
Thomas Kaiser, Shakeeb Bin Hasan, Thomas Paul +2
We analytically derive a rigorous expression for the relative impedance ratio between two photonic structures based on their electromagnetic interaction. Our approach generalizes t…
Real-time determination of laser beam quality by modal decomposition
Oliver A. Schmidt, Christian Schulze, Daniel Flamm +4
We present a real-time method to determine the beam propagation ratio M2 of laser beams. The all-optical measurement of modal amplitudes yields M2 parameters conform to the ISO sta…