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Stephan Hruszkewycz
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Research Interests
My research focuses on using and developing scattering techniques in conjunction with computational tools to characterize nanoscale structure and dynamics in materials, most recently with coherent x-ray diffraction.
I am currently involved in developing hard x-ray Bragg ptychography techniques at the CNM/APS Nanoprobe beamline for imaging nano- and meso- scale structure in complex materials in working environments. I am also involved in the development and implementation of x-ray photon correlation spectroscopy at the Linac Coherent Light Source, where we aim to measure femtosecond dynamics in materials at atomic resolutions – probing time and length scales in materials that could not be accessed experimentally until now.
Selected Publications
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S.O. Hruszkewycz, M.V. Holt, J. Maser, C.E. Murray, M.J. Highland, C.M. Folkman, P.H. Fuoss. Coherent Bragg nanodiffraction at the Hard X-ray Nanoprobe beamline, Philosophical Transactions A, accepted June 2013.
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S.O. Hruszkewycz, M.J. Highland, M.V. Holt, D. Kim, C.M. Folkman, C. Thompson, A. Tripathi, G.B. Stephenson, S. Hong, P.H. Fuoss. Imaging local polarization in ferroelectric thin films by coherent x-ray Bragg projection ptychography, Physical Review Letters, 110, 177601 (2013). [article link]. Press highlights: CNM, Nanowerk
- S.O. Hruszkewycz, M. Sutton, P. H. Fuoss, B. Adams, S. Rosenkranz, K. F. Ludwig, W. Roseker, D. Fritz, M. Cammarata, D. Zhu, S. H. Lee, H. Lemke, C. Gutt, A. Robert, G. Gruebel, G. B. Stephenson. High contrast x-ray speckle from atomic-scale ordering in liquids and glasses. Physical Review Letters, 109, 185502 (2012). [article link, with supplemental]. Press highlights: ANL, SLAC
- S.O. Hruszkewycz, M. V. Holt, C. E. Murray, J. Bruley, J. Holt, A. Tripathi, O. G. Shpyrko, I. McNulty, M. J. Highland, P. H. Fuoss. Quantitative imaging of lattice distortions in epitaxial semiconductor heterostructures using x-ray Bragg projection ptychography. Nano Letters, 12, (10), 5148, (2012). [article link, with supplemental]. Press highlights: Phys.org, Imaging & Microscopy, R&D, CNM
- S.O. Hruszkewycz, C.M. Folkman, M.J. Highland, M.V. Holt, S.H. Baek, S.K. Streiffer, P. Baldo, C.B. Eom, P.H. Fuoss. X-ray nanodiffraction of tilted domains in a poled epitaxial BiFeO3 thin film. Applied Physics Letters, 99, 232903 (2011). [article link]
- S.O. Hruszkewycz, M.V. Holt, A. Tripathi, J. Maser, P.H. Fuoss. Framework for three-dimensional coherent diffraction imaging by focused beam x-ray Bragg ptychography. Optics Letters, 36, 2227 (2011). [article link]
- S.O. Hruszkewycz, R. Harder, X. Xiao, P. H. Fuoss. The effect of exit beam phase aberrations on parallel beam coherent x-ray reconstructions. Review of Scientific Instruments, 81, 123706 (2010). [article link]
Invited Research Talks
- NSLS-II First Experiments Workshop, Upton NY, August 2013.
- Bragg projection ptychography of nanostructured thin films with nanofocused hard x-rays. NSLS/CFN Users Meeting, Upton NY, May 2013.
- Hard x-ray Bragg projection ptychography: Mapping nanoscale lattice heterogeneity in crystalline thin films. Ptychography 2013, Munich Germany, May 2013.
- Applications of Bragg projection ptychography. TMS 2013, San Antonio TX, March 2013.
- Bragg projection ptychography of nanostructured thin films. Real & Reciprocal Space Imaging Workshop, The Royal Society at Chichley Hall, Newport Pagnell UK, February 2013.
- High contrast x-ray speckle from atomic-scale ordering in liquids and glasses. Coherence 2012, Fukuoka Japan, June 2012.
- Focused beam Bragg ptychography: A new approach to imaging nanostructures. 21st International Conference on X-ray Optics and Microanalysis, Campinas Brazil, Sept 2011.
- Scanning probe diffraction microscopy at the CNM/APS Nanoprobe beamline. Denver X-ray Conference, Denver CO, July 2010.
