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Visibility spectroscopy with electron waves using a Wien filter: higher order corrections

Sonnentag1, Kiesel, Hasselbach

  • 1Universitat Tubingen, Institut fur Angewandte Physik, Germany. peter.sonnentag@uni-tuebingen.de

Micron (Oxford, England : 1993)
|March 31, 2000
PubMed
Summary

Researchers have enhanced electron wave Fourier spectroscopy precision by accounting for Wien filter focusing effects. This improves energy spectrum determination accuracy in electron wave experiments.

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Area of Science:

  • Quantum optics
  • Electron wave physics
  • Spectroscopy

Background:

  • Fourier spectroscopy offers high precision in light optics.
  • Realizing electron wave Fourier spectroscopy requires advanced interferometry.
  • Wien filters are crucial for wave packet manipulation in electron interferometers.

Purpose of the Study:

  • To improve the precision of electron wave Fourier spectroscopy.
  • To address higher-order corrections from Wien filter focusing effects.
  • To enhance the evaluation of energy spectrum measurements.

Main Methods:

  • Incorporating a crossed-field analyzer (Wien filter) into a biprism interferometer.
  • Developing a transformation variable for evaluating measurement data.

Related Experiment Videos

  • Analyzing the focusing action of the Wien filter.

    • Main Results:

    • A method to account for higher-order corrections from Wien filter focusing was established.
    • The transformation variable is proportional to the quotient of electric field strength and fringe spacing.
    • The study provides a pathway for more accurate electron energy spectrum determination.

    Conclusions:

    • Accurate evaluation of electron wave Fourier spectroscopy necessitates considering Wien filter higher-order corrections.
    • The proposed transformation variable facilitates precise energy spectrum analysis.
    • Further investigation into the interference of inelastically scattered electrons is suggested.