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Transport gap engineering by contact geometry in graphene nanoribbons: Experimental and theoretical studies on artificial materials
Thomas Stegmann, John A. Franco-Villafañe, Ulrich Kuhl +2
Electron transport in small graphene nanoribbons is studied by microwave emulation experiments and tight-binding calculations. In particular, it is investigated under which conditi…
Wave Front Shaping in Quasi-One-Dimensional Waveguides
Julian Böhm, Ulrich Kuhl
Using 10 monopole antennas reaching into a rectangular multi mode waveguide we shape the incident wave to create specific transport even after scattering events. Each antenna is at…
Waveguide photonic limiters based on topologically protected resonant modes
U. Kuhl, F. Mortessagne, E. Makri +2
We propose a concept of chiral photonic limiters utilising topologically protected localised midgap defect states in a photonic waveguide. The chiral symmetry alleviates the effect…
Channel cross-correlations in transport through complex media
Stefan Gehler, Bernd Köber, Giuseppe Luca Celardo +1
Measuring transmission between four antennas in microwave cavities, we investigate directly the channel cross-correlations of the cross sections from antenna at $\vec{…
Dynamically encircling exceptional points in a waveguide: asymmetric mode switching from the breakdown of adiabaticity
Jörg Doppler, Alexei A. Mailybaev, Julian Böhm +7
Physical systems with loss or gain feature resonant modes that are decaying or growing exponentially with time. Whenever two such modes coalesce both in their resonant frequency an…
Microwave emulations and tight-binding calculations of transport in polyacetylene
Thomas Stegmann, John A. Franco-Villafañe, Yenni P. Ortiz +3
A novel approach to investigate the electron transport of cis- and trans-polyacetylene chains in the single-electron approximation is presented by using microwave emulation measure…