A5013453673- Laser-Matter Interactions and Applications
- Advanced Chemical Physics Studies
- Spectroscopy and Quantum Chemical Studies
- Mass Spectrometry Techniques and Applications
- Laser Design and Applications
- Light effects on plants
- Advanced Electron Microscopy Techniques and Applications
- Quantum, superfluid, helium dynamics
- Nuclear Physics and Applications
Lund University
2023-2024
We investigate the spatial characteristics of high-order harmonic radiation generated in argon and observe cross-like patterns far field. An analytical model describing harmonics from an astigmatic driving beam reveals that these result order generation position-dependent divergence harmonics. Even small amounts field astigmatism may patterns, coming superposition individual with profiles elongated different directions. By correcting aberrations using a deformable mirror, we show fine-tuning...
Attosecond photoelectron spectroscopy has opened up for studying light–matter interaction on ultrafast time scales. It is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an actively stabilized, versatile, high spectral resolution attosecond beamline based a Mach-Zehnder interferometer. The active stabilization keeps the interferometer ultra-stable several hours RMS stability of 13 as total pump-probe delay...
Attosecond photoelectron spectroscopy is often performed with interferometric experimental setups that require outstanding stability. We demonstrate and characterize in detail an actively stabilized, versatile, high spectral resolution attosecond beamline. The active-stabilization system can remain ultra-stable for several hours RMS stability of 13 as a total pump-probe delay scanning range \sim 400 fs. A tunable femtosecond laser source to drive high-order harmonic generation allows...
We investigate the spatial characteristics of high-order harmonic radiation generated in argon, and observe cross-like patterns far field. An analytical model describing harmonics from an astigmatic driving beam reveals that these result order generation position dependent divergence harmonics. Even small amounts field astigmatism may patterns, coming superposition individual with profiles elongated different directions. By correcting aberrations using a deformable mirror, we show...
A photoelectron, emitted due to the absorption of light quanta as described by photoelectric effect, is often characterized experimentally a classical quantity, its momentum. However, since photoelectron quantum object, rigorous characterization requires reconstruction complete state, photoelectron's density matrix. Here, we use state tomography fully characterize photoelectrons from helium and argon atoms upon ultrashort, extreme ultraviolet pulses. While in measure pure photoelectronic...