Femtosecond laser plasma x-ray for time-resolved spectroscopy

Hidetoshi Nakano; Katsuya Oguri; Tadashi Nishikawa; Naoshi Uesugi

doi:10.1117/12.582796

21 October 2004 Femtosecond laser plasma x-ray for time-resolved spectroscopy

Hidetoshi Nakano, Katsuya Oguri, Tadashi Nishikawa, Naoshi Uesugi

Proceedings Volume 5581, ROMOPTO 2003: Seventh Conference on Optics; (2004) https://doi.org/10.1117/12.582796
Event: ROMOPTO 2003: Seventh Conference on Optics, 2003, Constanta, Romania

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 L_II,III edge. We also employed a picosecond soft x-ray to measure the spatiotemporal evolution of ablated particles in femtosecond-laser-produced aluminum plasma.

Citation Download Citation

Hidetoshi Nakano, Katsuya Oguri, Tadashi Nishikawa, and Naoshi Uesugi "Femtosecond laser plasma x-ray for time-resolved spectroscopy", Proc. SPIE 5581, ROMOPTO 2003: Seventh Conference on Optics, (21 October 2004); https://doi.org/10.1117/12.582796

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