Holo-Workshop 2018 first

The Holo-Workshop takes place from 26th June through 28th June 2018 at the Seehotel Zeuthen. This workshop will cover the scope to all electron microscopy methods, which are directly related to handling the phase of the electron wave.

 Location: Seehotel Zeuthen

Time: Tuesday, June 26, 9:00 am – Thursday, June 28, 6:00 pm

Sponsors:

 
              

Preliminary time table:
9:00 am – 11:00 pm    Session
11:00 am – 11:30 am    Coffee break
11:30 am –  1:00 pm     Session
1:00 pm –  2:30 pm     Lunch break
2:30 pm – 4:00 pm     Session
4:00 pm – 4:30 pm     Coffee break
4:30 pm – 6:00 pm     Session

Preliminary topics:

I. Insitu & Applications

  1. Insitu: biasing (leakage currents, shunt resistors), liquid cells, electron object interaction
  2. Time-resolved electron holography
  3. UTEM, laser-pulsed excitation
  4. Time-dependent specimen charging, Volta-phase plate due to local charging
  5. Biasing techniques/approaches
  6. Specimen Preparation for holographic methods
  7. Applications: magnetic fields
  8. Applications: electrostatic potentials, polarization fields, and atomic structure
  9. Applications: strain measurements

II. Differences in Phase Measurement Techniques

  1. Ptychography
  2. Beam Shaping (structured illumination, vortex beams)
  3. STEM Holography
  4. Dynamical Diffraction
  5. Dynamical effects on heterostructures, simulations
  6. Pure state vs mixed state measured by different phase measurement methods
  7. Limits of interpretation of DPC and Ptychography (thicker samples, atomic resolution, pixelated detectors)
  8. In-line vs off-axis holography
  9. Phase in diffraction mode, Fourier holography
  10. Holography with vortex beams with different orbital momentum
  11. Application of vortex beams
  12. Holographic tomography
  13. Dark-field electron holography

III. Challenges in Interpretation of Phase Measurements

  1. Modelling and parameter estimation
  2. Dynamical Diffraction
  3. Specimen Preparation for holographic methods
  4. Stray fields
  5. New methods for empty hologram, normalization
  6. Specimen Preparation for holographic methods
  7. Object-modulated reference wave (e.g. stray fields, magnetic fields)
  8. Time-dependent specimen charging, Volta-phase plate due to local charging
  9. Dynamical effects on heterostructures
  10. Mean inner potential: role of surfaces
  11. Contacts: charging, band structures, generation of charge carriers, and currents
  12. Validation of results as measured by phase methods
  13. Electrostatic polarization fields in heterostructures: DPC vs EH (specimen preparation, local charging, local currents, local heating)
  14. Long-term fluctuations of phase measurements => offset, instabilities, charging, drift of illumination and deflectors/lens currents

IV. Instrumentation

  1. Pixelated Detectors
  2. Time-resolved electron holography
  3. UTEM, laser-pulsed excitation
  4. Big data and data handling
  5. Open software, open access, open data
  6. Phase plates (Zernike, Volta, Zach)
  7. Phase measurements with light
  8. Vortex beams
  9. Holographic tomography

V. Outreach Politics & Future Challenges

  1. Open software, open access, open data
  2. Scientific questions by materials scientists and solid state physicists
  3. Challenges by real world problems