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Title: Methods and devices for measuring orbital angular momentum states of electrons

Abstract

A device for measuring electron orbital angular momentum states in an electron microscope includes the following components aligned sequentially in the following order along an electron beam axis: a phase unwrapper (U) that is a first electrostatic refractive optical element comprising an electrode and a conductive plate, where the electrode is aligned perpendicular to the conductive plate; a first electron lens system (L1); a phase corrector (C) that is a second electrostatic refractive optical element comprising an array of electrodes with alternating electrostatic bias; and a second electron lens system (L2). The phase unwrapper may be a needle electrode or knife edge electrode.

Inventors:
;
Issue Date:
Research Org.:
Univ. of Oregon, Eugene, OR (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1438423
Patent Number(s):
9,960,008
Application Number:
15/632,131
Assignee:
University of Oregon (Eugene, OR) CHO
DOE Contract Number:  
SC0010466
Resource Type:
Patent
Resource Relation:
Patent File Date: 2017 Jun 23
Country of Publication:
United States
Language:
English
Subject:
47 OTHER INSTRUMENTATION

Citation Formats

McMorran, Benjamin J., and Harvey, Tyler R. Methods and devices for measuring orbital angular momentum states of electrons. United States: N. p., 2018. Web.
McMorran, Benjamin J., & Harvey, Tyler R. Methods and devices for measuring orbital angular momentum states of electrons. United States.
McMorran, Benjamin J., and Harvey, Tyler R. Tue . "Methods and devices for measuring orbital angular momentum states of electrons". United States. https://www.osti.gov/servlets/purl/1438423.
@article{osti_1438423,
title = {Methods and devices for measuring orbital angular momentum states of electrons},
author = {McMorran, Benjamin J. and Harvey, Tyler R.},
abstractNote = {A device for measuring electron orbital angular momentum states in an electron microscope includes the following components aligned sequentially in the following order along an electron beam axis: a phase unwrapper (U) that is a first electrostatic refractive optical element comprising an electrode and a conductive plate, where the electrode is aligned perpendicular to the conductive plate; a first electron lens system (L1); a phase corrector (C) that is a second electrostatic refractive optical element comprising an array of electrodes with alternating electrostatic bias; and a second electron lens system (L2). The phase unwrapper may be a needle electrode or knife edge electrode.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2018},
month = {5}
}

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Works referenced in this record:

Electron Vortex Beams with High Quanta of Orbital Angular Momentum
journal, January 2011

  • McMorran, B. J.; Agrawal, A.; Anderson, I. M.
  • Science, Vol. 331, Issue 6014, p. 192-195
  • DOI: 10.1126/science.1198804

Efficient Sorting of Orbital Angular Momentum States of Light
journal, October 2010

  • Berkhout, Gregorius C. G.; Lavery, Martin P. J.; Courtial, Johannes
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  • DOI: 10.1103/PhysRevLett.105.153601

Electron holography in the study of the electrostatic fields: the case of charged microtips
journal, August 1992


Stern-Gerlach-like approach to electron orbital angular momentum measurement
journal, February 2017

  • Harvey, Tyler R.; Grillo, Vincenzo; McMorran, Benjamin J.
  • Physical Review A, Vol. 95, Issue 2, Article No. 021801
  • DOI: 10.1103/PhysRevA.95.021801

Efficient sorting of free electron orbital angular momentum
journal, February 2017

  • McMorran, Benjamin J.; Harvey, Tyler R.; Lavery, Martin P. J.
  • New Journal of Physics, Vol. 19, Issue 2, Article No. 023053
  • DOI: 10.1088/1367-2630/aa5f6f