“How fast can one turn on a current?” is a fundamentally important question behind boosting up the speed of modern electronics, since the data and signals are transferred via the flow of electrons. In joint work with the group of Prof. Heiko B. Weber of FAU's Applied Physics Chair, we have opened up a new channel for achieving ultrafast turning-on of currents in graphene, an exotic conducting material, on the timescale of a single femtosecond (1 femtosecond is a billionth of a millionth of a second).
Welcome to the website of the Chair for Laser Physics!
At the moment we work in three main branches of research that combine the topics of laser physics, quantum, electron, and nano optics, strong-field and attosecond physics, plasmonics and solid state research. We investigate the wave and particle properties of electrons in ultrafast processes in and at nano objects; we develop new particle traps to create quantum optical systems in order to build a quantum electron microscope; we use laser pulses at photonic nanostructures to look into novel concepts for particle acceleration.
The main part of our laboratory is centered around light-matter interaction on fastest time scales, namely the femtosecond and attosecond time scale (1 fs = 1 millionth of a billionth of a second, 1 as = 1 billionth of a billionth of a second). This allows us, to put it a bit more abstractly, to work towards understanding und utilizing photon-electron coupling in various systems. A part of this is based on highly advanced methods to control electrons, often with light fields, which requires building new laser sources and amplifiers.
A manuscript on the experimental demonstration of an interaction between free electrons and an optical travelling wave has been accepted for publication in Nature Physics
Poster award for Dr. Takuya Higuchi at Gordon Research Conference on Quantum Control of Light & Matter
Dr. Takuya Higuchi has received the best poster award at the Gordon Research Conference on Quantum Control of Light & Matter. The poster describes quantum mechanical interference effects of electrons in graphene, controlled by the fast oscillating field of ultrashort laser pulses. Congratulation...
Demonstration of electron acceleration by an optical evanescent wave at a flat dielectric-vacuum interface published in Optics Express
We could theoretically and experimentally demonstrate an inelastic interaction between free electrons and an optical evanescent wave excited by total internal reflection at the planar interface between high-refractive index materials (silicon, germanium) and vacuum. This effect is interesting for bo...