498 citations · 866 across the 18 of their papers we have counts for
19 papers
Photoinduced twist and untwist of moiré superlattices in TMDC heterobilayers
C. J. R. Duncan, A. C. Johnson, I. Maity +15
Two-dimensional moiré materials are formed by artificially stacking atomically thin monolayers. A wealth of correlated and topological quantum phases can be engineered via precise…
Multi-scale time-resolved electron diffraction: A case study in moiré materials
C. J. R. Duncan, M. Kaemingk, W. H. Li +16
Ultrafast-optical-pump -- structural-probe measurements, including ultrafast electron and x-ray scattering, provide direct experimental access to the fundamental timescales of atom…
Characterization of 128x128 MM-PAD-2.1 ASIC: A Fast Framing Hard X-Ray Detector with High Dynamic Range
D. Gadkari, K. S. Shanks, H. Hu +4
We characterize a new x-ray Mixed-Mode Pixel Array Detector (MM-PAD-2.1) Application Specific Integrated Circuit (ASIC). Using an integrating pixel front-end with dynamic charge re…
Very-High Dynamic Range, 10,000 frames/second Pixel Array Detector for Electron Microscopy
Hugh T. Philipp, Mark W. Tate, Katherine S. Shanks +10
Precision and accuracy of quantitative scanning transmission electron microscopy (STEM) methods such as ptychography, and the mapping of electric, magnetic and strain fields depend…
Transferring Orbital Angular Momentum to an Electron Beam Reveals Toroidal and Chiral Order
Kayla X. Nguyen, Yi Jiang, Michael C. Cao +13
Orbital angular momentum and torque transfer play central roles in a wide range of magnetic textures and devices including skyrmions and spin-torque electronics(1-4). Analogous top…
Characterization of an architecture for front-end pixel binning in an integrating pixel array detector
D. Gadkari, K. S. Shanks, H. T. Philipp +3
Optimization of an area detector involves compromises between various parameters like frame rate, read noise, dynamic range and pixel size. We have implemented and tested a novel f…
High dynamic range CdTe mixed-mode pixel array detector (MM-PAD) for kilohertz imaging of hard x-rays
Hugh T. Philipp, Mark W. Tate, Katherine S. Shanks +2
A hard x-ray, high-speed, high dynamic range scientific x-ray imager is described. The imager is based on the mixed-mode pixel array detector (MM-PAD) readout chip coupled to a 750…
Experimental 3D Coherent Diffractive Imaging from photon-sparse random projections
K. Giewekemeyer, A. Aquila, N. D. Loh +17
The routine atomic-resolution structure determination of single particles is expected to have profound implications for probing the structure-function relationship in systems rangi…
Strain Mapping of Two-Dimensional Heterostructures with Sub-Picometer Precision
Yimo Han, Kayla Nguyen, Michael Cao +7
Next-generation, atomically thin devices require in-plane, one-dimensional heterojunctions to electrically connect different two-dimensional (2D) materials. However, the lattice mi…
Deep sub-Ångstrom imaging of 2D materials with a high dynamic range detector
Yi Jiang, Zhen Chen, Yimo Han +9
Aberration-corrected optics have made electron microscopy at atomic-resolution a widespread and often essential tool for nanocharacterization. Image resolution is dominated by beam…
Theory and Practice of Electron Diffraction from Single Atoms and Extended Objects using an Electron Microscope Pixel Array Detector
Michael C. Cao, Yimo Han, Zhen Chen +5
What does the diffraction pattern from a single atom look like? How does it differ from the scattering from long range potential? With the development of new high-dynamic range pix…
Characterization of Chromium Compensated GaAs as an x-ray Sensor Material for Charge-Integrating Pixel Array Detectors
Julian Becker, Mark W. Tate, Katherine S. Shanks +5
We studied the properties of chromium compensated GaAs when coupled to charge integrating ASICs as a function of detector temperature, applied bias and x-ray tube energy. The mater…
Sub-Microsecond X-Ray Imaging Using Hole-Collecting Schottky type CdTe with Charge-Integrating Pixel Array Detectors
Julian Becker, Mark W. Tate, Katherine S. Shanks +5
CdTe is increasingly being used as the x-ray sensing material in imaging pixel array detectors for x-rays, generally above 20 keV, where silicon sensors become unacceptably transpa…
High Dynamic Range X-ray Detector Pixel Architectures Utilizing Charge Removal
Joel T. Weiss, Katherine S. Shanks, Hugh T. Philipp +5
Several charge integrating CMOS pixel front-ends utilizing charge removal techniques have been fabricated to extend dynamic range for x-ray diffraction applications at synchrotron…
Characterization of CdTe Sensors with Schottky Contacts Coupled to Charge-Integrating Pixel Array Detectors for X-Ray Science
Julian Becker, Mark W. Tate, Katherine S. Shanks +6
Pixel Array Detectors (PADs) consist of an x-ray sensor layer bonded pixel-by-pixel to an underlying readout chip. This approach allows both the sensor and the custom pixel electro…
High Dynamic Range Pixel Array Detector for Scanning Transmission Electron Microscopy
Mark W. Tate, Prafull Purohit, Darol Chamberlain +13
We describe a hybrid pixel array detector (EMPAD - electron microscope pixel array detector) adapted for use in electron microscope applications, especially as a universal detector…
Real-Space x-ray tomographic reconstruction of randomly oriented objects with sparse data frames
Kartik Ayyer, Hugh T. Philipp, Mark W. Tate +2
Schemes for X-ray imaging single protein molecules using new x-ray sources, like x-ray free electron lasers (XFELs), require processing many frames of data that are obtained by tak…
Solving Structure with Sparse, Randomly-Oriented X-ray Data
Hugh T. Philipp, Kartik Ayyer, Mark W. Tate +2
Single-particle imaging experiments of biomolecules at x-ray free-electron lasers (XFELs) require processing of hundreds of thousands (or more) of images that contain very few x-ra…
Pressure Induced Hydration Dynamics of Membranes
F. Osterberg, M. Kriechbaum, A. Polcyn +5
Pressure-jump initiated time-resolved x-ray diffraction studies of dynamics of the hydration of the hexagonal phase in biological membranes show that (i) the relaxation of the unit…