Energy-filtered phase retrieval using the transport of intensity equation

V. J. Keast; M. J. Gladys; T. C. Petersen; C. Dwyer; C. T. Koch; T. Haber; G. Kothleitner

doi:10.1063/1.3663572

Energy-filtered phase retrieval using the transport of intensity equation

V. J. Keast, M. J. Gladys, T. C. Petersen, C. Dwyer, C. T. Koch, T. Haber, G. Kothleitner

Physics

Research output: Contribution to journal › Article › peer-review

7 Scopus citations

Abstract

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.

Original language	English (US)
Article number	221905
Journal	Applied Physics Letters
Volume	99
Issue number	22
DOIs	https://doi.org/10.1063/1.3663572
State	Published - Nov 28 2011

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.3663572

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title = "Energy-filtered phase retrieval using the transport of intensity equation",

abstract = "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.",

author = "Keast, {V. J.} and Gladys, {M. J.} and Petersen, {T. C.} and C. Dwyer and Koch, {C. T.} and T. Haber and G. Kothleitner",

note = "Funding Information: B. Schaffer and W. Grogger are thanked for providing the EFTEM alignment script. B. Kraus of Gatan is thanked for assistance on modifying the GIF quantum quadrupole settings for improved energy resolution. T.C.P. would like to acknowledge D. M. Paganin and J. Barry for useful comments. Financial support was provided by the Australian Research Council (ARC) and additional travel support by the Deutscher Akademischer Austauschdienst (DAAD). C.T.K. acknowledges funding from the Carl Zeiss Foundation.",

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doi = "10.1063/1.3663572",

language = "English (US)",

volume = "99",

journal = "Applied Physics Letters",

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AU - Keast, V. J.

AU - Gladys, M. J.

AU - Petersen, T. C.

AU - Dwyer, C.

AU - Koch, C. T.

AU - Haber, T.

AU - Kothleitner, G.

N1 - Funding Information: B. Schaffer and W. Grogger are thanked for providing the EFTEM alignment script. B. Kraus of Gatan is thanked for assistance on modifying the GIF quantum quadrupole settings for improved energy resolution. T.C.P. would like to acknowledge D. M. Paganin and J. Barry for useful comments. Financial support was provided by the Australian Research Council (ARC) and additional travel support by the Deutscher Akademischer Austauschdienst (DAAD). C.T.K. acknowledges funding from the Carl Zeiss Foundation.

PY - 2011/11/28

Y1 - 2011/11/28

N2 - 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.

AB - 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.

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Energy-filtered phase retrieval using the transport of intensity equation

Abstract

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