A novel-type tunable and narrowband extreme ultraviolet radiation source based on high-harmonic conversion of picosecond laser pulses

Year: 2005

Authors: Barkauskas M., Brandi F., Giammanco F., Neshev D., Pirri A., Ubachs W.

Autors Affiliation: Laser Centre, Department of Physics and Astronomy, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam, Netherlands; Department of Physics, University of Pisa, Via F. Buonarotti 2, 56127 Pisa, Italy; Nonlinear Physics Centre, Res. Sch. of Phys. Sci. and Eng., Australian National University, Canberra, Australia

Abstract: At the Laser Centre Vrije Universiteit a table-top size, tunable and narrowband laser-based source of extreme ultraviolet radiation was developed using high-harmonic generation of powerful laser pulses of 300 ps duration and Fourier-transform limited bandwidth. The generated radiation has unprecedented spectral purity of lambda/Delta lambda > 2.5 x 10(5) at wavelengths covering the entire tunability range of 40-100 nm. The process of high-order harmonic generation was investigated in different gases (Ar, Kr, Xe, N-2) uncovering resonance phenomena for the conversion efficiency of specific harmonic orders.

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More Information: European Geosciences Union, EGU, HPMT-CT-2000-00063. RII3-CT-2003-506350. – M.B. and A.P. acknowledge the European Union for a Marie Curie host site fellowship at LCVU (HPMT-CT-2000-00063). This study is supported by the European Community—Integrated Infrastructure Initiative action (RII3-CT-2003-506350). D.N. acknowledges the financial support of the Australian Research Council and Centre for Ultrahigh-bandwidth Devices for Optical Systems (CUDOS).
KeyWords: Extreme ultraviolet radiation; High-harmonic generation; Laser spectroscopy