Publications

2023

Purohit, P., Leugering, L., & Manohar, R. (2023). An Efficient Data Structure for Sparse Bit-Vectors with Applications in Neuromorphic Computing. 28th IEEE International Symposium on Asynchronous Circuits and Systems (ASYNC), pp. 1-10.
Nguyen, K. X., Jiang, Y., Cao, M. C., Purohit, P., Yadav, A. K., García-Fernández, P., ... & Muller, D. A. (2023). Transferring orbital angular momentum to an electron beam reveals toroidal and chiral order. Physical Review B, 107 (20), 205419.

2022

Purohit, P., & Manohar, R. (2022). Field-programmable encoding for address-event representation. Frontiers in Neuroscience, 16.

2021

Purohit, P., & Manohar, R. (2021). Hierarchical Token Rings for Address-Event Encoding. 27th IEEE International Symposium on Asynchronous Circuits and Systems (ASYNC), pp. 9-16.
Shanks, K. S., Philipp, H. T., Weizeorick J. T., Hammer M., Tate M. W., Hu H., Purohit P., Baldwin, J.D., Miceli, A., Thom-Levy, J. & Gruner, S.M. (2021). Characterization of a Small-Scale Prototype Detector With Wide Dynamic Range for Time-Resolved High-Energy X-Ray Applications. IEEE Transactions on Nuclear Science, vol. 68, no. 12, pp. 2753-2761.

2020

Philipp, H. T., Tate, M. W., Shanks, K. S., Purohit, P., & Gruner, S. M. (2020). High dynamic range CdTe mixed-mode pixel array detector (MM-PAD) for kilohertz imaging of hard x-rays. Journal of Instrumentation, 15(06), P06025.
Nguyen, K. X., Jiang, Y., Cao, M. C., Purohit, P., Yadav, A. K., García-Fernández, P., ... & Muller, D. A. (2020). Transferring orbital angular momentum to an electron beam reveals toroidal and chiral order. arXiv preprint arXiv:2012.04134.

2019

Philipp, H. T., Tate, M. W., Shanks, K. S., Purohit, P., & Gruner, S. M. (2019). Practical considerations for high-speed X-ray pixel array detectors and X-ray sensing materials. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 925, 18-23.
Muller, D.A., Chen, Z., Jiang, Y., Odstrcil, M., Han, Y., Purohit, P., Tate, M.W., Gruner, S.M. and Elser, V. (2019). Phase Imaging beyond the Diffraction Limit with Electron Ptychography. Microscopy and Microanalysis, 25(S2), pp. 6-7.
Hromalik, M., Burkey, K., Burns, T., Lin, B., Shanks, K., Purohit, P., Philipps, H., Tate, M. and Gruner, S. (2019). Low-noise, low-power, event-driven read-out of counting Pixel Array Detectors. 8th IEEE International Workshop on Advances in Sensors and Interfaces (IWASI), pp. 163-167.
Shanks, K.S., Philipp, H.T., Weizeorick, J.T., Hammer, M., Tate, M.W., Purohit, P., Miceli, A. and Gruner, S.M. (2019). Characterization of a Fast-Framing X-Ray Camera With Wide Dynamic Range for High-Energy Imaging. IEEE Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), pp. 1-2.

2018

Jiang, Y., Chen, Z., Han, Y., Deb, P., Gao, H., Xie, S., Purohit, P., ... & Muller, D. A. (2018). Electron ptychography of 2D materials to deep sub-ångström resolution. Nature, 559(7714), 343-349.
Shanks, K. S., Philipp, H. T., Tate, M. W., Purohit, P., & Gruner, S. M. (2018). Development of a Fast-Framing X-Ray Camera with Wide Dynamic Range for High-Energy Imaging. IEEE Nuclear Science Symposium and Medical Imaging Conference Proceedings (NSS/MIC).
Nguyen, K.X., Jiang, Y., Cao, M.C., Purohit, P., Yadav, A.K., Junquera, J., Tate, M.W., Gruner, S.M., Ramesh, R., Salahuddin, S. and Muller, D.A. (2018). Mapping Polarity, Toroidal Order, and the Local Energy Landscape by 4D-STEM. Microscopy and Microanalysis, 24(S1), pp.176-177.
Chen, Z., Jiang, Y., Han, Y., Deb, P., Gao, H., Xie, S., Purohit, P., Tate, M.W., Park, J., Gruner, S.M. and Elser, V. (2018). Real-space Demonstration of 0.4 Angstrom Resolution at 80 keV via Electron Ptychography with a High Dynamic Range Pixel Array Detector. Microscopy and Microanalysis, 24(S1), pp.194-195.
Han, Y., Nguyen, K., Cao, M., Cueva, P., Tate, M.W., Purohit, P., Xie, S., Li, M.Y., Li, L.J., Park, J. and Gruner, S.M. (2018). Mapping Strain and Relaxation in 2D Heterojunctions with Sub-picometer Precision. Microscopy and Microanalysis, 24(S1), pp.1588-1589.
Han, Y., Nguyen, K., Cao, M., Cueva, P., Xie, S., Tate, M.W., Purohit, P., Gruner, S.M., Park, J. and Muller, D.A. (2018). Strain mapping of two-dimensional heterostructures with subpicometer precision. Nano letters, 18(6), pp.3746-3751.
Becker, J., Tate, M.W., Shanks, K.S., Philipp, H.T., Weiss, J.T., Purohit, P., Chamberlain, D. and Gruner, S.M. (2018). Characterization of chromium compensated GaAs as an X-ray sensor material for charge-integrating pixel array detectors. Journal of Instrumentation, 13(01), p.P01007.
Hustedt, C.J., Lambert, P.K., Kannan, V., Huskins-Retzlaff, E.L., Casem, D.T., Tate, M.W., Philipp, H.T., Woll, A.R., Purohit, P., Weiss, J.T. and Gruner, S.M. (2018). In situ time-resolved measurements of extension twinning during dynamic compression of polycrystalline magnesium. Journal of Dynamic Behavior of Materials, 4(2), pp.222-230.

2017

Nguyen, K. X., Jiang, Y., Cao, M. C., Purohit, P., Yadav, A. K., Junquera, J., ... & Muller, D. A. (2017). Measuring Orbital Angular Momentum (OAM) and Torque Transfer from Polarization Vortices with the Electron Microscopy Pixel Array Detector. Microscopy and Microanalysis, 23(S1), 1634-1635.
Nguyen, K., Jiang, Y., Cao, M., Purohit, P., Chang, C., Yadav, A., ... & Muller, D. (2017). Reconstruction of Polarization Vortices by Diffraction Mapping of Ferroelectric PbTiO3/SrTiO3 Superlattice Using a High Dynamic Range Pixelated Detector. Bulletin of the American Physical Society, 62.
Cao, M. C., Han, Y., Jiang, Y., Nguyen, K. X., Purohit, P., Tate, M. W., ... & Muller, D. A. (2017). Theory and Practice of Diffractometry on Single Tungsten Atoms using Electron Microscope Pixel Array Detectors. Microscopy and Microanalysis, 23(S1), 444-445.
Han, Y., Xie, S., Nguyen, K., Cao, M., Tate, M. W., Purohit, P., ... & Muller, D. A. (2017). Picometer-Precision Strain Mapping of Two-Dimensional Heterostructures using an Electron Microscope Pixel Array Detector (EMPAD). Microscopy and Microanalysis, 23(S1), 1712-1713.
Chatterjee, K., Ko, J. Y. P., Weiss, J. T., Philipp, H. T., Becker, J., Purohit, P., ... & Beaudoin, A. J. (2017). Study of residual stresses in Ti-7Al using theory and experiments. Journal of the Mechanics and Physics of Solids, 109, 95-116.
Becker, J., Tate, M. W., Shanks, K. S., Philipp, H. T., Weiss, J. T., Purohit, P., ... & Gruner, S. M. (2017). Sub-microsecond x-ray imaging using hole-collecting Schottky type CdTe with charge-integrating pixel array detectors. Journal of Instrumentation, 12(06), P06022.
Weiss, J. T., Shanks, K. S., Philipp, H. T., Becker, J., Chamberlain, D., Purohit, P., ... & Gruner, S. M. (2017). High dynamic range x-ray detector pixel architectures utilizing charge removal. IEEE Transactions on Nuclear Science, 64(4), 1101-1107.

2016

Tate, M. W., Purohit, P., Chamberlain, D., Nguyen, K. X., Hovden, R., Chang, C. S., ... & Ralph, D. C. (2016). High dynamic range pixel array detector for scanning transmission electron microscopy. Microscopy and Microanalysis, 22(01), 237-249.
Nguyen, K. X., Purohit, P., Yadav, A., Tate, M. W., Chang, C. S., Ramesh, R., ... & Muller, D. A. (2016). Reconstruction of Polarization Vortices by Diffraction Mapping of Ferroelectric PbTiO3/SrTiO3 Superlattice Using a High Dynamic Range Pixelated Detector. Microscopy and Microanalysis, 22(S3), 472-473.
Nguyen, K. X., Purohit, P., Hovden, R., Turgut, E., Tate, M. W., Kourkoutis, L. F., ... & Muller, D. A. (2016). 4D-STEM for Quantitative Imaging of Magnetic Materials with Enhanced Contrast and Resolution. Microscopy and Microanalysis, 22(S3), 1718-1719.
Philipp, H. T., Tate, M. W., Purohit, P., Chamberlain, D., Shanks, K. S., Weiss, J. T., & Gruner, S. M. (2016). High-speed x-ray imaging with the Keck pixel array detector (Keck PAD) for time-resolved experiments at synchrotron sources. AIP Conference Proceedings (Vol. 1741, No. 1, p. 040036).
Philipp, H. T., Tate, M. W., Purohit, P., Shanks, K. S., Weiss, J. T., & Gruner, S. M. (2016). High-speed X-ray imaging pixel array detector for synchrotron bunch isolation. Journal of synchrotron radiation, 23(2), 395-403.
Muller, D. A., Nguyen, K. X., Tate, M. W., Purohit, P., Chang, C., Cao, M., & Gruner, S. M. (2016). An Electron Microscope Pixel Array Detector as a Universal STEM Detector. Microscopy and Microanalysis, 22(S3), 478-479.
Muller, D. A., Han, Y., Nguyen, K. X., Tate, M. W., Purohit, P., Xie, S., ... & Gruner, S. M. (2016). Electron diffraction from a single atom and optimal signal detection. Microscopy and Microanalysis, 22(S3), 846-847.
Becker, J., Tate, M. W., Shanks, K. S., Philipp, H. T., Weiss, J. T., Purohit, P., ... & Gruner, S. M. (2016). Characterization of CdTe sensors with Schottky contacts coupled to charge-integrating pixel array detectors for X-ray science. Journal of Instrumentation, 11(12), P12013.
Becker, J., Tate, M. W., Shanks, K. S., Philipp, H. T., Weiss, J. T., Purohit, P., ... & Gruner, S. M. (2016, July). High-speed imaging at high x-ray energy: CdTe sensors coupled to charge-integrating pixel array detectors. In AIP Conference Proceedings (Vol. 1741, No. 1, p. 040037).

2015 & earlier

Nguyen, K. X., Hovden, R., Tate, M. W., Purohit, P., Heron, J., Chang, C., ... & Muller, D. A. (2015). Lorentz-STEM imaging of Fields and Domains using a High-Speed, High-Dynamic Range Pixel Array Detector at Atomic Resolution. Microscopy and Microanalysis, 21(S3), 2309-2310.
Lambert, P.K., Hustedt, C.J., Vecchio, K.S., Huskins, E.L., Casem, D.T., Gruner, S.M., Tate, M.W., Philipp, H.T., Woll, A.R., Purohit, P., ... & Hufnagel, T. C. (2014). Time-resolved x-ray diffraction techniques for bulk polycrystalline materials under dynamic loading. Review of Scientific Instruments, 85(9), 093901.
Tate, M. W., D. Chamberlain, K. S. Green, H. T. Philipp, P. Purohit, C. Strohman, and S. M. Gruner. "A medium-format, mixed-mode pixel array detector for kilohertz X-ray imaging." In Journal of Physics: Conference Series, vol. 425, no. 6, p. 062004. IOP Publishing, 2013.
Mondragon, A. F., & Purohit, P. (2011). ARM/FPGA/I2C Sensor Network Development and Teaching Platform. In American Society for Engineering Education. American Society for Engineering Education.