Photoemission electron microscopy using extreme ultraviolet attosecond pulse trains

Journal Article · Tue Dec 15 00:00:00 EST 2009 · Review of Scientific Instruments

DOI:https://doi.org/10.1063/1.3263759· OSTI ID:22051121

Mikkelsen, A; Schwenke, J; Fordell, T; Luo, G; Kluender, K; Hilner, E; Anttu, N; Lundgren, E; Mauritsson, J; Andersen, J N; Xu, H Q; L'Huillier, A ^[1]; Zakharov, A A ^[2]

---

1. Department of Physics, Lund University, Box 118, 22100 Lund (Sweden)
2. MAX-lab, Lund University, Box 118, 22100 Lund (Sweden)

We report the first experiments carried out on a new imaging setup, which combines the high spatial resolution of a photoemission electron microscope (PEEM) with the temporal resolution of extreme ultraviolet (XUV) attosecond pulse trains. The very short pulses were provided by high-harmonic generation and used to illuminate lithographic structures and Au nanoparticles, which, in turn, were imaged with a PEEM resolving features below 300 nm. We argue that the spatial resolution is limited by the lack of electron energy filtering in this particular demonstration experiment. Problems with extensive space charge effects, which can occur due to the low probe pulse repetition rate and extremely short duration, are solved by reducing peak intensity while maintaining a sufficient average intensity to allow imaging. Finally, a powerful femtosecond infrared (IR) beam was combined with the XUV beam in a pump-probe setup where delays could be varied from subfemtoseconds to picoseconds. The IR pump beam could induce multiphoton electron emission in resonant features on the surface. The interaction between the electrons emitted by the pump and probe pulses could be observed.

• OSTI ID: 22051121
• Journal Information: Review of Scientific Instruments, Vol. 80, Issue 12; Other Information: (c) 2009 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0034-6748
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
ELECTRON EMISSION
ELECTRON MICROSCOPES
ELECTRON MICROSCOPY
ELECTRONS
EMISSION SPECTROSCOPY
EXTREME ULTRAVIOLET RADIATION
GOLD
HARMONIC GENERATION
INFRARED RADIATION
MULTI-PHOTON PROCESSES
NANOSTRUCTURES
PARTICLES
PHOTOELECTRON SPECTROSCOPY
PHOTOEMISSION
PHOTON-ELECTRON COLLISIONS
PROBES
PULSES
SPACE CHARGE
SPATIAL RESOLUTION