Coherent Harmonic Generation at DELTA: A New Facility for Ultrashort Pulses in the VUV and THz Regime

摘要

Synchrotron radiation sources producing high-brilliance radiation with tunable wavelength in the VUV to X-ray regime are ideally suited to study the structure of matter on the atomic scale. With a pulse duration of typically 30-100 ps (FWHM), however, they cannot resolve dynamic phenomena such as lattice vibrations, phase transitions, chemical reactions, or fast magnetization changes. Mode-locked lasers, on the other hand, produce intense pulses with a duration below 100 fs, but only at near-visible wavelengths. In the quest for short pulse duration and short wavelength, good progress has been made. High harmonic generation (HHG) or X-rays from a laser-generated plasma have become standard techniques in many laser laboratories. Linac-based free-electron lasers (FELs) have reached the ? ngstr??m wavelength regime, a pulse duration of a few femtoseconds, and unprecedented peak brilliance [11. Emma, P. 2010. Nature Photonics, 4: 641[CrossRef], [Web of Science ?]View all references]. As for conventional synchrotron light sources, pulses of a few picoseconds can be produced by lowering the momentum compaction factor and thus reducing the bunch length (see e.g. [22. Abo-Bakr, M. 2003. Phys. Rev. Lett., 90: 094801[CrossRef], [Web of Science ?]View all references]). Even shorter pulses are obtained by combining electron bunches with femtosecond laser pulses.View full textDownload full textRelated var addthis_config = { ui_cobrand: "Taylor & Francis Online", services_compact: "citeulike,netvibes,twitter,technorati,delicious,linkedin,facebook,stumbleupon,digg,google,more", pubid: "ra-4dff56cd6bb1830b" }; Add to shortlist Link Permalink http://dx.doi.org/10.1080/08940886.2011.618092