High-purity free-electron momentum states prepared by three-dimensional optical phase modulation
Armin Feist, Sergey V. Yalunin, Sascha Schäfer, Claus Ropers
Abstract
This paper demonstrates a laser-based and femtosecond-switchable inelastic electron beam splitter. Coherent optical phase modulation of 200-keV electrons at a thin electron-transparent membrane is used to prepare a high-purity three-dimensional momentum superposition state, which is characterized in energy and momentum space.
Topics & Concepts
PhysicsMomentum (technical analysis)Superposition principlePhase (matter)Modulation (music)ElectronPhase modulationAtomic physicsBeam (structure)Momentum transferInelastic scatteringCondensed matter physicsOpticsCathode rayEnergy (signal processing)Quantum mechanicsCoherent statesAngular momentumQuantum electrodynamicsEnergy–momentum relationOptical pumpingAdvanced Electron Microscopy Techniques and ApplicationsOrbital Angular Momentum in OpticsLaser-Matter Interactions and Applications