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Electrostatically confined monolayer graphene quantum dots with orbital and valley splittings
Nils M. Freitag, Larisa A. Chizhova, Peter Nemes-Incze +8
The electrostatic confinement of massless charge carriers is hampered by Klein tunneling. Circumventing this problem in graphene mainly relies on carving out nanostructures or appl…
Two-color coherent control of femtosecond above-threshold photoemission from a tungsten nanotip
Michael Förster, Timo Paschen, Michael Krüger +6
We demonstrate coherent control of multiphoton and above-threshold photoemission from a single solid-state nanoemitter driven by a fundamental and a weak second harmonic laser puls…
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…