Coherence Improvement of Dual-Lens Electron Holography

Microscopic Optical Coherence Holography

Marie Walde, Benedict Diederich, Bei Cao, Rainer Heintzmann 1 Berlin Institute for Medical Systems Biology, Max Delbrück Center, Robert-Rössle-Str. 10, 13125 Berlin, Germany 2 Institute of Physical Chemistry, Friedrich-Schiller-University Jena, Helmholtzweg 4, 07743 Jena, Germany 3 Xi'an Institute of Optics and Precision Mechanics of CAS, China 4 Leibniz Institute of Photonic Technology, Albert...

Ferroelectric electron holography.

Ferroelectrics are increasingly important as materials in semiconductor technology, e.g. for building non-volatile memory chips. For optimisation of the properties of such devices, there is an urgent need for methods, which analyse the ferroelectric properties at nanometer scale. Furthermore, the basic understanding of the interaction of ferroelectrics with electrons in the transmission electro...

Pulsed electron holography

Electron Holography: Recent Developments

With the ever increasing speed of modern computers, computing-power hungry applications as electron holography can become more interactive and user friendly and be available for live-time application. New phase unwrapping algorithms and improved reconstruction techniques are discussed together with new approaches to improve the signal/noise ratio in reconstructed phase and amplitude images. Whi...

Optimising electron holography in the presence of partial coherence and instrument instabilities.

Off-axis electron holography provides a direct means of retrieving the phase of the wavefield in a transmission electron microscope, enabling measurement of electric and magnetic fields at length scales from microns to nanometers. To maximise the accuracy of the technique, it is important to acquire holograms using experimental conditions that optimise the phase resolution for a given spatial r...