Improved efficiency of materials processing by dual action of XUV/Vis-NIR ultrashort laser pulses and comprehensive study of high-order harmonic source at PALS

Krzysztof Jakubczak; Tomas Mocek; Bedrich Rus; Jan Hrebicek; Magdalena Sawicka; I Jong Kim; Seung Beom Park; Tae Keun Kim; Gye Hwang Lee; Chang Hee Nam; Jaromir Chalupsky; Vera Hajkova; Libor Juha; Jaroslav Sobota; Tomas Fort

doi:10.1117/12.826404

4 September 2009 Improved efficiency of materials processing by dual action of XUV/Vis-NIR ultrashort laser pulses and comprehensive study of high-order harmonic source at PALS

Krzysztof Jakubczak, Tomas Mocek, Bedrich Rus, Jan Hrebicek, Magdalena Sawicka, I Jong Kim, Seung Beom Park, Tae Keun Kim, Gye Hwang Lee, Chang Hee Nam, Jaromir Chalupsky, Vera Hajkova, Libor Juha, Jaroslav Sobota, Tomas Fort

Author Affiliations +

Proceedings Volume 7448, Advances in X-Ray/EUV Optics and Components IV; 744806 (2009) https://doi.org/10.1117/12.826404
Event: SPIE Optical Engineering + Applications, 2009, San Diego, California, United States

Abstract

We demonstrate a novel experimental method for improvement of efficiency of structural surface modification of various solids (PMMA, amorphous carbon) achieved by simultaneous action of XUV (21.6 nm), obtained from high-order harmonic generation (HHG), and VIS-NIR (410/820 nm) laser pulses. Although the fluence of each individual pulse was far below the surface ablation threshold, very efficient and specific material modification was observed after irradiation by a single or a few shots of mixed XUV/VIS-NIR radiation. We also report results on comprehensive characterization of ultrafast coherent X-ray beamline at Prague Asterix Laser System (PALS). The beamline is based on 1 kHz, table-top, high-order harmonic generation source capable to deliver fully coherent beam in the 30 nm spectral range. Ti:sapphire (810 nm, 1 kHz) laser pulses with a duration of 35 fs and energy 1.2 mJ have been focused into gas cell containing conversion medium (Ar). To achieve highly efficient HHG we will apply the technique of guided laser pulses. Source parameters were investigated.

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Krzysztof Jakubczak, Tomas Mocek, Bedrich Rus, Jan Hrebicek, Magdalena Sawicka, I Jong Kim, Seung Beom Park, Tae Keun Kim, Gye Hwang Lee, Chang Hee Nam, Jaromir Chalupsky, Vera Hajkova, Libor Juha, Jaroslav Sobota, and Tomas Fort "Improved efficiency of materials processing by dual action of XUV/Vis-NIR ultrashort laser pulses and comprehensive study of high-order harmonic source at PALS", Proc. SPIE 7448, Advances in X-Ray/EUV Optics and Components IV, 744806 (4 September 2009); https://doi.org/10.1117/12.826404

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KEYWORDS

Extreme ultraviolet

Femtosecond phenomena

Infrared lasers

Polymethylmethacrylate

Argon

Near infrared

Infrared radiation

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