Siddharth Maddali

Computational physicist with a specialization in X-ray and optical imaging and microscopy for condensed matter and materials systems.

Fremont, California, United States of America

Research Expertise

Computational microscopy
Fourier/physical optics
signal processing
physics
HPC
Electrical and Electronic Engineering
Condensed Matter Physics
Electronic, Optical and Magnetic Materials
Biochemistry
Atomic and Molecular Physics, and Optics
Instrumentation
Radiation
Nuclear and High Energy Physics
Computational Mathematics
Mechanics of Materials
Inorganic Chemistry
Modeling and Simulation
Computer Science Applications
Metals and Alloys
Ceramics and Composites
Polymers and Plastics
Mechanical Engineering

About

Computational materials, imaging and microscopy scientist with **8 years combined experience** in industry and national laboratories. Expert in physics-based imaging and characterization with X-rays and optical probes, high-performance computing for light-matter interaction and materials data analysis. Experienced in machine learning for materials discovery. Previous experience at the National Energy Technology Laboratory, Argonne National Laboratory and KLA Corporation. <br>

Publications

Using automatic differentiation as a general framework for ptychographic reconstruction
Optics Express
2019
Comparison between diffraction contrast tomography and high-energy diffraction microscopy on a slightly deformed aluminium alloy
IUCrJ
2016
Strain Mapping of CdTe Grains in Photovoltaic Devices
IEEE Journal of Photovoltaics
2019
Multimodal X-ray imaging of grain-level properties and performance in a polycrystalline solar cell
Journal of Synchrotron Radiation
2019
Strain annealing of SiC nanoparticles revealed through Bragg coherent diffraction imaging for quantum technologies
Physical Review Materials
2018
Phase retrieval for Bragg coherent diffraction imaging at high x-ray energies
Physical Review A
2019
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part II
Journal of Applied Crystallography
2020
General approaches for shear-correcting coordinate transformations in Bragg coherent diffraction imaging. Part I
Journal of Applied Crystallography
2020
Importance of outliers: A three-dimensional study of coarsening in α -phase iron
Physical Review Materials
2019
High-Energy Coherent X-Ray Diffraction Microscopy of Polycrystal Grains: Steps Toward a Multiscale Approach
Physical Review Applied
2020
Efficient ptychographic phase retrieval via a matrix-free Levenberg-Marquardt algorithm
Optics Express
2021
9Cr steel visualization and predictive modeling
Computational Materials Science
2019
Topology-faithful nonparametric estimation and tracking of bulk interface networks
Computational Materials Science
2016
Experimental demonstration of coupled multi-peak Bragg coherent diffraction imaging with genetic algorithms
Physical Review B
2021
Nuclear chemistry research of high-energy nuclear reactions at Carnegie-Mellon University, 1961--1977. Summary report. [Summaries of research activities at Carnegie-Mellon University]
Unknown Venue
1977
3D Bragg Coherent Diffraction Imaging of Extended Nanowires: Defect Formation in Highly Strained InGaAs Quantum Wells
ACS Nano
2022
Grain boundary migration in polycrystalline α-Fe
Acta Materialia
2024
Sub-pixel high-resolution imaging of high-energy x-rays inspired by sub-wavelength optical imaging
Optics Express
2021
Enhancing the Use of Coals by Reburning-Sorbent Injection
Unknown Venue
2001
Dark field X-ray microscopy below liquid-helium temperature: The case of NaMnO2
Materials Characterization
2023
Time-resolved Dark-field X-ray Microscopy
Unknown Venue
2022
Laboratory Testing of the Boundary Layer Momentum Transfer Rotational Filter Systems, NETL-Innovatech, Inc., CRADA 98-F026, Final Report
Unknown Venue
2000
Concurrent multi-peak Bragg coherent x-ray diffraction imaging of 3D nanocrystal lattice displacement via global optimization
npj Computational Materials
2023
Detector Tilt Considerations in Bragg Coherent Diffraction Imaging: A Simulation Study
Crystals
2020
The Effect of Intensity Fluctuations on Sequential X-ray Photon Correlation Spectroscopy at the X-ray Free Electron Laser Facilities
Crystals
2020
Impact and mitigation of angular uncertainties in Bragg coherent x-ray diffraction imaging
Scientific Reports
2019
Sparse recovery of undersampled intensity patterns for coherent diffraction imaging at high X-ray energies
Scientific Reports
2018
Data Analytics for Alloy Qualification
Unknown Venue
2018
In-situ synchrotron x-ray studies of the microstructure and stability of In2O3 epitaxial films
Applied Physics Letters
2017

Education

Carnegie Mellon University

PhD, Physics / May, 2016

Pittsburgh, Pennsylvania, United States of America

Carnegie Mellon University

MS, Physics / May, 2011

Pittsburgh, Pennsylvania, United States of America

Indian Institute of Technology Madras

M.Sc, Physics / May, 2009

Chennai

Bangalore University

B.Sc, Physics, mathematics electronics / June, 2007

Bengaluru

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

Links & Social Media

Research Web Site

LinkedIn

Github
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