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Proceedings Article

Ultrafast microlocalized photoelectron bunches: formation and applications

[+] Author Affiliations
S. A. Aseyev, B. N. Mironov, V. G. Minogin, S. V. Chekalin

Institute of Spectroscopy (Russian Federation)

Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79931F (January 11, 2011); doi:10.1117/12.880060
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From Conference Volume 7993

  • ICONO 2010: International Conference on Coherent and Nonlinear Optics
  • Kazan, Russian Federation | August 23, 2010

abstract

The ultrafast e--bunches produced by femtosecond laser (fsl) radiation are powerful tool in modern physics to observe different ultrashort processes induced by fsl pulses and to reach high spatio-temporal resolution. In Letokhov's projection microscope such a beam transfers an information from a tip with a sample illluminated by fsl pulses to a detector. Here the fsl radiation provides for an effective photoelectron multiphoton emission without significant heating of the sample. Two organic samples, formed from dye molecules and the organic conducting polymers has been vizualized using the nanocapillary as a tip. The advantages of the nanocapillary tip are described in the report. The temporal resolution depends upon the pulse duration of the e--beam, τe. One of the most powerful way to measure τe is to use the Gaponov-Miller force (GMf), or the ponderomotive force, which the electrons experience in the inhomogeneous field of a focused laser pulse. Such a force helped us to demonstrate the «instantaneousness» of multiphoton emission process from solid targets. As the beam propagated, it spread in time. Using GMf we temporally characterized the e--pulse transmitted through microcapillary (which can be the basis of the promising scanning microscope) and combined spatial nanoresolution and picosecond temporal resolution. Also the ultrafast microlocalized e--beam is an ideal tool to measure the GMf created by focused fsl pulses and to characterize very intense laser beam profile in-situ. In principal, such approach may allow for direct subwave spatio-temporal probing of superintense laser beam profiles.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

S. A. Aseyev ; B. N. Mironov ; V. G. Minogin and S. V. Chekalin
"Ultrafast microlocalized photoelectron bunches: formation and applications", Proc. SPIE 7993, ICONO 2010: International Conference on Coherent and Nonlinear Optics, 79931F (January 11, 2011); doi:10.1117/12.880060; http://dx.doi.org/10.1117/12.880060


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