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Energy-filtered phase retrieval using the transport of intensity equation

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posted on 2025-05-10, 23:49 authored by Vicki KeastVicki Keast, Michael GladysMichael Gladys, T. C. Peterson, C. Dwyer, C. T. Koch, T. Haber
Energy-filtered imaging was combined with phase retrieval to study plasmon scattering contributions to electron phase shifts surrounding gold nanoparticles. Spectral windows with sufficient energy resolution to exclude plasmon scattering were used to measure through-focal intensity derivatives and retrieve phase maps via the transport of intensity equation. Phase excursions in the phase maps that included plasmon scattering were found to disagree with theory by at least an order of magnitude. This discrepancy was attributed to subtle particle instabilities under the electron beam, which lead to systematic errors in the retrieved phase maps.

History

Journal title

Applied Physics Letters

Volume

99

Issue

22

Publisher

American Institute of Physics

Language

  • en, English

College/Research Centre

Faculty of Science and Information Technology

School

School of Mathematical and Physical Sciences

Rights statement

© American Institute of Physics

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