Nanosecond electron microscopes

  • Bostanjoglo O
  • Elschner R
  • Mao Z
 et al. 
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Abstract

Combining electron optics, fast electronics and pulsed lasers, a transmission and a photoelectron emission microscope were built, which visualize events in thin films and on surfaces with a time resolution of several nanoseconds. The high-speed electron microscopy is capable to track fast laser-induced processes in metals below the ablation threshold, which are difficult to detect by other imaging techniques. The material response to nano- and femtosecond laser pulses was found to be very different. It was dominated by thermo/chemocapillary flow and chemical reactions in the case of nanosecond pulses, and by mechanical deformations and non-thermal electron emission after a femtosecond pulse.

Author-supplied keywords

  • Deformations and melt instabilities after ns and fs laser pulses
  • High-speed transmission and photoelectron microscopes

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Authors

  • O. Bostanjoglo

  • R. Elschner

  • Z. Mao

  • T. Nink

  • M. Weingärtner

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