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Proceedings Paper

Femtosecond laser plasma x-ray for time-resolved spectroscopy
Author(s): Hidetoshi Nakano; Katsuya Oguri; Tadashi Nishikawa; Naoshi Uesugi
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Paper Abstract

High-density plasma created near a solid surface by an intense femtosecond laser pulse emits ultrashort x-ray pulses that are synchronized with the laser pulse. We show the spectral and temporal properties of broadband soft-x-rays emitted from a femtosecond laser-produced plasma on a metal surface. The soft x-ray emission was increased about 20-fold by fabricating an array of nanocylinders on a gold surface. We demonstrate the cross-correlation measurement of soft x-ray pulse duration in the femtosecond region by using an optical field-induced ionization process in Kr gas. We used a 10-ps soft x-ray pulse to demonstrate the time-resolved absorption measurement of optically excited silicon near its LII,III edge. We also employed a picosecond soft x-ray to measure the spatiotemporal evolution of ablated particles in femtosecond-laser-produced aluminum plasma.

Paper Details

Date Published: 21 October 2004
PDF: 10 pages
Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); doi: 10.1117/12.582796
Show Author Affiliations
Hidetoshi Nakano, Nippon Telegraph and Telephone Corp. (Japan)
Katsuya Oguri, Nippon Telegraph and Telephone Corp. (Japan)
Tadashi Nishikawa, Nippon Telegraph and Telephone Corp. (Japan)
Naoshi Uesugi, Tohoku Institute of Technology (Japan)

Published in SPIE Proceedings Vol. 5581:
ROMOPTO 2003: Seventh Conference on Optics
Valentin I. Vlad, Editor(s)

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