Siddharth Maddali
Computational physicist with a specialization in X-ray and optical imaging and microscopy for condensed matter and materials systems.
Research Expertise
About
Publications
Using automatic differentiation as a general framework for ptychographic reconstruction
Optics Express / Jun 19, 2019
Kandel, S., Maddali, S., Allain, M., Hruszkewycz, S. O., Jacobsen, C., & Nashed, Y. S. G. (2019). Using automatic differentiation as a general framework for ptychographic reconstruction. Optics Express, 27(13), 18653. https://doi.org/10.1364/oe.27.018653
Comparison between diffraction contrast tomography and high-energy diffraction microscopy on a slightly deformed aluminium alloy
IUCrJ / Jan 01, 2016
Renversade, L., Quey, R., Ludwig, W., Menasche, D., Maddali, S., Suter, R. M., & Borbély, A. (2016). Comparison between diffraction contrast tomography and high-energy diffraction microscopy on a slightly deformed aluminium alloy. IUCrJ, 3(1), 32–42. https://doi.org/10.1107/s2052252515019995
Strain Mapping of CdTe Grains in Photovoltaic Devices
IEEE Journal of Photovoltaics / Nov 01, 2019
Calvo-Almazan, I., Huang, X., Yan, H., Nazaretski, E., Chu, Y. S., Hruszkewycz, S. O., Stuckelberger, M. E., Ulvestad, A. P., Colegrove, E., Ablekim, T., Holt, M. V., Hill, M. O., Maddali, S., Lauhon, L. J., & Bertoni, M. I. (2019). Strain Mapping of CdTe Grains in Photovoltaic Devices. IEEE Journal of Photovoltaics, 9(6), 1790–1799. https://doi.org/10.1109/jphotov.2019.2942487
Multimodal X-ray imaging of grain-level properties and performance in a polycrystalline solar cell
Journal of Synchrotron Radiation / May 14, 2019
Ulvestad, A., Hruszkewycz, S. O., Holt, M. V., Hill, M. O., Calvo-Almazán, I., Maddali, S., Huang, X., Yan, H., Nazaretski, E., Chu, Y. S., Lauhon, L. J., Rodkey, N., Bertoni, M. I., & Stuckelberger, M. E. (2019). Multimodal X-ray imaging of grain-level properties and performance in a polycrystalline solar cell. Journal of Synchrotron Radiation, 26(4), 1316–1321. https://doi.org/10.1107/s1600577519003606
Strain annealing of SiC nanoparticles revealed through Bragg coherent diffraction imaging for quantum technologies
Physical Review Materials / Aug 02, 2018
Hruszkewycz, S. O., Maddali, S., Anderson, C. P., Cha, W., Miao, K. C., Highland, M. J., Ulvestad, A., Awschalom, D. D., & Heremans, F. J. (2018). Strain annealing of SiC nanoparticles revealed through Bragg coherent diffraction imaging for quantum technologies. Physical Review Materials, 2(8). https://doi.org/10.1103/physrevmaterials.2.086001
Phase retrieval for Bragg coherent diffraction imaging at high x-ray energies
Physical Review A / May 23, 2019
Maddali, S., Allain, M., Cha, W., Harder, R., Park, J.-S., Kenesei, P., Almer, J., Nashed, Y., & Hruszkewycz, S. O. (2019). Phase retrieval for Bragg coherent diffraction imaging at high x-ray energies. Physical Review A, 99(5). https://doi.org/10.1103/physreva.99.053838
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part II
Journal of Applied Crystallography / Mar 06, 2020
Li, P., Maddali, S., Pateras, A., Calvo-Almazan, I., Hruszkewycz, S. O., Cha, W., Chamard, V., & Allain, M. (2020). General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part II. Journal of Applied Crystallography, 53(2), 404–418. https://doi.org/10.1107/s1600576720001375
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part I
Journal of Applied Crystallography / Mar 06, 2020
Maddali, S., Li, P., Pateras, A., Timbie, D., Delegan, N., Crook, A. L., Lee, H., Calvo-Almazan, I., Sheyfer, D., Cha, W., Heremans, F. J., Awschalom, D. D., Chamard, V., Allain, M., & Hruszkewycz, S. O. (2020). General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part I. Journal of Applied Crystallography, 53(2), 393–403. https://doi.org/10.1107/s1600576720001363
Importance of outliers: A
three-dimensional study of coarsening in
α
Physical Review Materials / Jun 27, 2019
Shen, Y.-F., Maddali, S., Menasche, D., Bhattacharya, A., Rohrer, G. S., & Suter, R. M. (2019). Importance of outliers: A three-dimensional study of coarsening in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mi>α</mml:mi></mml:math> -phase iron. Physical Review Materials, 3(6). https://doi.org/10.1103/physrevmaterials.3.063611
High-Energy Coherent X-Ray Diffraction Microscopy of Polycrystal Grains: Steps Toward a Multiscale Approach
Physical Review Applied / Aug 27, 2020
Maddali, S., Park, J.-S., Sharma, H., Shastri, S., Kenesei, P., Almer, J., Harder, R., Highland, M. J., Nashed, Y., & Hruszkewycz, S. O. (2020). High-Energy Coherent X-Ray Diffraction Microscopy of Polycrystal Grains: Steps Toward a Multiscale Approach. Physical Review Applied, 14(2). https://doi.org/10.1103/physrevapplied.14.024085
Efficient ptychographic phase retrieval via a matrix-free Levenberg-Marquardt algorithm
Optics Express / Jul 07, 2021
Kandel, S., Maddali, S., Nashed, Y. S. G., Hruszkewycz, S. O., Jacobsen, C., & Allain, M. (2021). Efficient ptychographic phase retrieval via a matrix-free Levenberg-Marquardt algorithm. Optics Express, 29(15), 23019. https://doi.org/10.1364/oe.422768
9Cr steel visualization and predictive modeling
Computational Materials Science / Oct 01, 2019
Krishnamurthy, N., Maddali, S., Hawk, J. A., & Romanov, V. N. (2019). 9Cr steel visualization and predictive modeling. Computational Materials Science, 168, 268–279. https://doi.org/10.1016/j.commatsci.2019.03.015
Topology-faithful nonparametric estimation and tracking of bulk interface networks
Computational Materials Science / Dec 01, 2016
Maddali, S., Ta’asan, S., & Suter, R. M. (2016). Topology-faithful nonparametric estimation and tracking of bulk interface networks. Computational Materials Science, 125, 328–340. https://doi.org/10.1016/j.commatsci.2016.08.021
Experimental demonstration of coupled multi-peak Bragg coherent diffraction imaging with genetic algorithms
Physical Review B / Jun 01, 2021
Wilkin, M. J., Maddali, S., Hruszkewycz, S. O., Pateras, A., Sandberg, R. L., Harder, R., Cha, W., Suter, R. M., & Rollett, A. D. (2021). Experimental demonstration of coupled multi-peak Bragg coherent diffraction imaging with genetic algorithms. Physical Review B, 103(21). https://doi.org/10.1103/physrevb.103.214103
Nuclear chemistry research of high-energy nuclear reactions at Carnegie-Mellon University, 1961--1977. Summary report. [Summaries of research activities at Carnegie-Mellon University]
Nov 01, 1977
Caretto, A. A. Jr. (1977). Nuclear chemistry research of high-energy nuclear reactions at Carnegie-Mellon University, 1961--1977. Summary report. [Summaries of research activities at Carnegie-Mellon University]. Office of Scientific and Technical Information (OSTI). https://doi.org/10.2172/5086119
3D Bragg Coherent Diffraction Imaging of Extended Nanowires: Defect Formation in Highly Strained InGaAs Quantum Wells
ACS Nano / Nov 15, 2022
Hill, M. O., Schmiedeke, P., Huang, C., Maddali, S., Hu, X., Hruszkewycz, S. O., Finley, J. J., Koblmüller, G., & Lauhon, L. J. (2022). 3D Bragg Coherent Diffraction Imaging of Extended Nanowires: Defect Formation in Highly Strained InGaAs Quantum Wells. ACS Nano, 16(12), 20281–20293. https://doi.org/10.1021/acsnano.2c06071
Grain boundary migration in polycrystalline α-Fe
Acta Materialia / Jan 01, 2024
Xu, Z., Shen, Y.-F., Naghibzadeh, S. K., Peng, X., Muralikrishnan, V., Maddali, S., Menasche, D., Krause, A. R., Dayal, K., Suter, R. M., & Rohrer, G. S. (2024). Grain boundary migration in polycrystalline α-Fe. Acta Materialia, 264, 119541. https://doi.org/10.1016/j.actamat.2023.119541
Sub-pixel high-resolution imaging of high-energy x-rays inspired by sub-wavelength optical imaging
Optics Express / Oct 11, 2021
Bertaux, N., Allain, M., Weizeorick, J., Park, J.-S., Kenesei, P., Shastri, S. D., Almer, J., Highland, M. J., Maddali, S., & Hruszkewycz, S. O. (2021). Sub-pixel high-resolution imaging of high-energy x-rays inspired by sub-wavelength optical imaging. Optics Express, 29(22), 35003. https://doi.org/10.1364/oe.438945
Enhancing the Use of Coals by Reburning-Sorbent Injection
Jan 31, 2001
(2001). Enhancing the Use of Coals by Reburning-Sorbent Injection. Office of Scientific and Technical Information (OSTI). https://doi.org/10.2172/774068
Dark field X-ray microscopy below liquid-helium temperature: The case of NaMnO2
Materials Characterization / Oct 01, 2023
Plumb, J., Poudyal, I., Dally, R. L., Daly, S., Wilson, S. D., & Islam, Z. (2023). Dark field X-ray microscopy below liquid-helium temperature: The case of NaMnO2. Materials Characterization, 204, 113174. https://doi.org/10.1016/j.matchar.2023.113174
Time-resolved Dark-field X-ray Microscopy
Jul 07, 2022
Poudyal, I., Qiao, Z., Armstrong, M., & Islam, Z. (2022). Time-resolved Dark-field X-ray Microscopy. https://doi.org/10.26226/m.62a9d1ee9deaf4fdb6b3fde8
Laboratory Testing of the Boundary Layer Momentum Transfer Rotational Filter Systems, NETL-Innovatech, Inc., CRADA 98-F026, Final Report
Aug 22, 2000
(2000). Laboratory Testing of the Boundary Layer Momentum Transfer Rotational Filter Systems, NETL-Innovatech, Inc., CRADA 98-F026, Final Report. Office of Scientific and Technical Information (OSTI). https://doi.org/10.2172/774788
Concurrent multi-peak Bragg coherent x-ray diffraction imaging of 3D nanocrystal lattice displacement via global optimization
npj Computational Materials / May 23, 2023
Maddali, S., Frazer, T. D., Delegan, N., Harmon, K. J., Sullivan, S. E., Allain, M., Cha, W., Dibos, A., Poudyal, I., Kandel, S., Nashed, Y. S. G., Heremans, F. J., You, H., Cao, Y., & Hruszkewycz, S. O. (2023). Concurrent multi-peak Bragg coherent x-ray diffraction imaging of 3D nanocrystal lattice displacement via global optimization. Npj Computational Materials, 9(1). https://doi.org/10.1038/s41524-023-01022-7
Detector Tilt Considerations in Bragg Coherent Diffraction Imaging: A Simulation Study
Crystals / Dec 17, 2020
Maddali, S., Allain, M., Li, P., Chamard, V., & Hruszkewycz, S. O. (2020). Detector Tilt Considerations in Bragg Coherent Diffraction Imaging: A Simulation Study. Crystals, 10(12), 1150. https://doi.org/10.3390/cryst10121150
The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities
Crystals / Dec 04, 2020
Cao, Y., Sheyfer, D., Jiang, Z., Maddali, S., You, H., Wang, B.-X., Ye, Z.-G., Dufresne, E. M., Zhou, H., Stephenson, G. B., & Hruszkewycz, S. O. (2020). The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities. Crystals, 10(12), 1109. https://doi.org/10.3390/cryst10121109
Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
Scientific Reports / Apr 23, 2019
Calvo-Almazán, I., Allain, M., Maddali, S., Chamard, V., & Hruszkewycz, S. O. (2019). Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging. Scientific Reports, 9(1). https://doi.org/10.1038/s41598-019-42797-4
Sparse recovery of undersampled intensity patterns for coherent diffraction imaging at high X-ray energies
Scientific Reports / Mar 21, 2018
Maddali, S., Calvo-Almazan, I., Almer, J., Kenesei, P., Park, J.-S., Harder, R., Nashed, Y., & Hruszkewycz, S. O. (2018). Sparse recovery of undersampled intensity patterns for coherent diffraction imaging at high X-ray energies. Scientific Reports, 8(1). https://doi.org/10.1038/s41598-018-23040-y
Data Analytics for Alloy Qualification
Mar 20, 2018
Krishnamurthy, N., Maddali, S., Verma, A., Bruckman, L., Carter, J., French, R., Romanov, V., & Hawk, J. (2018). Data Analytics for Alloy Qualification. Office of Scientific and Technical Information (OSTI). https://doi.org/10.2172/1456238
In-situ synchrotron x-ray studies of the microstructure and stability of In2O3 epitaxial films
Applied Physics Letters / Oct 16, 2017
Highland, M. J., Hruszkewycz, S. O., Fong, D. D., Thompson, C., Fuoss, P. H., Calvo-Almazan, I., Maddali, S., Ulvestad, A., Nazaretski, E., Huang, X., Yan, H., Chu, Y. S., Zhou, H., Baldo, P. M., & Eastman, J. A. (2017). In-situ synchrotron x-ray studies of the microstructure and stability of In2O3 epitaxial films. Applied Physics Letters, 111(16). https://doi.org/10.1063/1.4997773
Education
Carnegie Mellon University
PhD, Physics / May, 2016
Carnegie Mellon University
MS, Physics / May, 2011
Indian Institute of Technology Madras
M.Sc, Physics / May, 2009
Bangalore University
B.Sc, Physics, mathematics electronics / June, 2007
Experience
KLA (United States)
Research Scientist / November, 2022 — Present
Sensitivity enhancement of optical inspection of semiconductor wafers
Argonne National Laboratory
Staff Scientist / October, 2019 — September, 2022
(1) Imaging: Inverse problems for 3D nanoscale materials imaging using coherent X-ray probes. (2) Time-resolved studies: Signal processing methods for XPCS at free electron laser facilities. (3) Experiments: POCs & demonstrations for the above at APS/future APS-U instruments. (4) Fundraising: Research grants (LDRD, DoE), APS, ESRF user-time proposals. (5) Dissemination/Outreach: Publications, peer review, editorship, conferences, tech reports. (6) Mentoring/Organization: Postdocs, students (unofficial), workshop planning/chairing.
Post-doctoral researcher / January, 2017 — September, 2019
National Energy Technology Laboratory
Postdoctoral Fellow / May, 2016 — November, 2016
Machine learning -driven materials discovery of steel alloys for optimized power plant components
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