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
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.
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...
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...
One should think that the optical phase evolution of a common pulsed focused laser beam is known for a long time already — that’s not the case! Our lab in collaboration with colleagues around Prof. Gerhard Paulus’s group in Jena has, for the first time, measured the phase in the fo...