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Proceedings Paper

Efficient x-ray pulse generation from femtosecond-laser-produced plasma and its application to time-resolved spectroscopy
Author(s): Hidetoshi Nakano; Tadashi Nishikawa; Naoshi Uesugi
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Paper Abstract

High-density plasmas created near a solid surface by a femtosecond laser pulse emit ultrashort x-ray pulses that are synchronized to the laser pulse. The spectral and temporal properties of x-rays emitted from a femtosecond laser-produced on metal surface are shown. The minimum pulse duration was less than 3 ps. More than a 30-fold enhancement of soft x-ray emission was achieved by fabricating an array of nanoholes on an alumina surface. Utilizing a 10-ps soft x-ray pulse, we demonstrated time-resolved soft x-ray absorption measurement of optically excited silicon near its LII,III edge. We found that a laser pulse irradiation caused a more than 10% increase in soft x-ray absorption near the edge, which recovered within 20 ps.

Paper Details

Date Published: 29 June 2001
PDF: 9 pages
Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); doi: 10.1117/12.432833
Show Author Affiliations
Hidetoshi Nakano, NTT Basic Research Labs. (Japan)
Tadashi Nishikawa, NTT Basic Research Labs. (Japan)
Naoshi Uesugi, Tohoku Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 4430:
ROMOPTO 2000: Sixth Conference on Optics
Valentin I. Vlad, Editor(s)

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