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Proceedings Paper

Time-resolved absorption spectroscopy using ultrashort soft x-ray pulse from femtosecond laser-produced plasma
Author(s): Hidetoshi Nakano; Tadashi Nishikawa; Katsuya Oguri
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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 alo employed a picosecond soft x-ray to measure the spatiotemporal evolution of ablated particles in femtosecond-laser-produced aluminum plasma.

Paper Details

Date Published: 10 June 2004
PDF: 10 pages
Proc. SPIE 5482, Laser Optics 2003: Superintense Light Fields and Ultrafast Processes, (10 June 2004); doi: 10.1117/12.558586
Show Author Affiliations
Hidetoshi Nakano, NTT Basic Research Labs. (Japan)
Tadashi Nishikawa, NTT Basic Research Labs. (Japan)
Katsuya Oguri, NTT Basic Research Labs. (Japan)

Published in SPIE Proceedings Vol. 5482:
Laser Optics 2003: Superintense Light Fields and Ultrafast Processes
Vladimir E. Yashin; Alexandr A. Andreev, Editor(s)

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