Efficient x-ray pulse generation from femtosecond-laser-produced plasma and its application to time-resolved spectroscopy

Hidetoshi Nakano; Tadashi Nishikawa; Naoshi Uesugi

doi:10.1117/12.432833

29 June 2001 Efficient x-ray pulse generation from femtosecond-laser-produced plasma and its application to time-resolved spectroscopy

Hidetoshi Nakano, Tadashi Nishikawa, Naoshi Uesugi

Author Affiliations +

Proceedings Volume 4430, ROMOPTO 2000: Sixth Conference on Optics; (2001) https://doi.org/10.1117/12.432833
Event: ROMOPTO 2000: Sixth Conference on Optics, 2000, Bucharest, Romania

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 L_II,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.

Citation Download Citation

Hidetoshi Nakano, Tadashi Nishikawa, and Naoshi Uesugi "Efficient x-ray pulse generation from femtosecond-laser-produced plasma and its application to time-resolved spectroscopy", Proc. SPIE 4430, ROMOPTO 2000: Sixth Conference on Optics, (29 June 2001); https://doi.org/10.1117/12.432833

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