Thomas K. Baldwin Curriculum Vitae

Thomas Kendrick Baldwin

Portland, OR

baldwint.com

tkb@sent.com


Interests

Scientific computation, machine learning, and data science. Quantum information hardware, especially diamond nitrogen vacancy centers. Optics of low-dimensional semiconductor systems (dots, wells).

Education

2008-2015
University of Oregon, Eugene, OR
Ph.D., Physics.

Adviser: Hailin Wang. Project: Trion-based Optical Processes in Semiconductor Quantum Wells.

2004-2008
Grinnell College, Grinnell, IA
B.A., Physics, magna cum laude.

Advisers: Sujeev Wickramasekara and Charles Cunningham. Trustee Honor Scholar, National Merit Scholar.

Spring 2007
Albert-Ludwigs Universit├Ąt, Freiburg, Germany

Exchange semester, Institute for the International Education of Students.

2000-2004
Sandia High School, Albuquerque, NM

Experience

2017-Present
Data Scientist
Cascade Data Labs, Portland, OR
  • Developed and deployed statistical models for a major personalized marketing program, including: Uplift optimization trees, Bayesian transaction count models, anomaly detection, Prophet time series forecasting.
  • Designed and conducted real-world tests to measure campaign performance and generate training data for optimization models.
  • Built and maintained automatic weekly campaign reporting solution for a large customer loyalty program. Distilled terabyte-scale raw data inputs to rich interactive Tableau dashboards using Spark SQL and Airflow.
  • Conducted ad hoc analyses for business stakeholders. Including dataset creation, formulating new KPIs, visualizing and presenting findings.
2016-2017
Adjunct Professor
Lane Community College, Eugene, OR
  • Taught two sections of calculus-based physics:
    • PH 211 (F16+W17, 10 credit hours): Nature of science, mathematical representation, classical Newtonian mechanics, energy and momentum. With lab.
  • Taught two courses in conceptual physics for non-majors:
    • PH 101 (F16, 4 credit hours): Data analysis, laws of motion, momentum, energy, gravity. With lab.
    • PH 103 (S17, 4 credit hours): Atomic physics, quantum mechanics, nuclear physics, special and general relativity, astrophysics. With lab.
  • Participated in faculty seminar on the Scholarship of Teaching and Learning (S17). With Dennis Gilbert.
2017
Independent Research Contractor
Eugene, OR
  • Updated a LIDAR model for a local optics company.
  • Researched and applied methods to account for pulse stretching induced by forward light scattering in seawater.
  • Translated model code from MATLAB to Python.
2016
Insight Data Science Fellow
Insight Data Science
  • Created Snotelier, a site implementing automated avalanche danger summaries for climbers and backcountry skiers.
  • Built dataset in PostgreSQL by scraping data from Northwest Avalanche Center website and combining with USDA snow telemetry (SNOTEL) measurements available via public API.
  • Engineered features and fit a logistic regression model to predict avalanche danger using pandas and scikit-learn.
  • Implemented web app based on Flask, Bootstrap, and the Google Maps API.
  • Project completed in less than three weeks.
2009-2015
Graduate Research Assistant
Oregon Center for Optics, Eugene, OR

Adviser: Hailin Wang.

  • Primary project: investigating interlayer exciton-correlated hole tunneling in Gallium Arsenide (GaAs) mixed-type quantum well (MTQW) structures at high magnetic fields.
  • Side project: Diamond nitrogen-vacancy (NV) centers as a quantum bit candidate. Ion implantation and annealing, imaging of single emitters using homebuilt confocal microscope, manipulation of ground state spin using microwaves, excited-state spectroscopy at cryogenic temperatures, photon antibunching.
  • Pump-probe spectroscopy of excitons, trions, and biexcitons in semiconductor quantum wells (GaAs, CdTe) and Bragg microcavities.
  • Developed pulse shaper based on a phase-only spatial light modulator (SLM), with protection system based on BBO crystal frequency doubling.
  • Two-time high-field user at National High Magnetic Field Laboratory, Tallahassee, FL. Operated 25T Split-Florida Helix at cryogenic temperatures, in both Voigt and Faraday geometries.
  • Numerical modeling of NV centers (optical Bloch equation), microcavities (transfer matrix method), and valence subbands in GaAs quantum wells (Luttinger-Kohn Hamiltonian) using Python and MATLAB.
  • Developed Python-based data acquisition utilities: Instrument communication library, confocal microscope graphical user interface.
2015
Science Literacy Program Fellow
University of Oregon, Eugene, OR
  • Co-instructed PHYS 155, “Physics Behind the Internet”, a course for non-physics majors, in Fall 2015. With Eric Corwin.
2010-2012
Graduate STEM Fellow in K-12 Education (NSF GK-12)
University of Oregon, Eugene, OR
  • Piloted FOSS inquiry-based science curriculum in rural school districts (Boardman, Pendleton), grades 4-6. Daily team teaching during four 2-week stays as scientist in residence.
  • Guest scientist, Crow Middle/High School (2011). Supervised students preparing for EWEB solar car challenge. Developed curriculum on solar spectrum and filter functions.
  • Developed bicycle smoothie machine for Charlemagne Fox Hollow Elementary School, Eugene, OR. With Carrie Grabowski (2011, 2012, 2013, 2015).
2008-2010
Graduate Teaching Fellow
University of Oregon, Eugene, OR
  • Instructed three sections of tutorial recitation for PHYS 201-203, a three-term course in algebra-based general physics (2009-2010).
  • Grader for astronomy courses (2008-2009).
  • Tutor in the physics drop-in help center.
Summer 2008
Summer Undergraduate Research Fellow (SURF)
Optoelectronic Division, NIST, Boulder, CO

Adviser: Kevin Silverman.

  • Photoluminescence and annealing of self-assembled quantum dots.
  • Translated data-acquisition programs from MATLAB to Python.
Summer 2006
Summer Undergraduate Research Fellow (SURF)
Electromagnetic Division, NIST, Boulder, CO

Adviser: Pavel Kabos.

  • Finite-element modeling of a near-field microwave microscope using HFSS software.
  • Characterization of carbon nanotube samples using this microscope.
2005-2006
Mathematics Department Tutor
Grinnell College, Grinnell, IA
  • Helped students with calculus and linear algebra in the college math lab.
2005-2008
Student Worker and Manager
Grinnell Outdoor Recreation Program, Grinnell, IA
  • Led weeklong first-year orientation (2005, 2007), weekend trips, and indoor rock climbing sessions.
  • Activities Manager, Fall 2006.
  • Climbing Manager, Fall 2007.
Summers 2004, 2005
Technical Student Intern
Z Machine, Sandia National Laboratories, Albuquerque, NM

Adviser: Carlos Ruiz.

  • Surveyed activation products using gamma spectroscopy.
  • Fitting of neutron-yield data from nuclear fusion experiments.

Publications

Journal articles:

  1. D. Andrew Golter, Thomas K. Baldwin, and Hailin Wang. “Protecting a Solid-State Spin from Decoherence Using Dressed Spin States.” Physical Review Letters 113, 237601 (2014). DOI: 10.1103/PhysRevLett.113.237601
  2. Thomas K. Baldwin, Carey Phelps, Hailin Wang, and John P. Prineas. “Persistence of trions and quenching of excitons in optically induced two-dimensional electron gases in mixed-type GaAs/AlAs quantum wells.” Journal of the Optical Society of America B 31, 3138 (2014). DOI: 10.1364/JOSAB.31.003138
  3. Thomas K. Baldwin, Stephen A. McGill, and Hailin Wang. “Exciton-correlated hole tunneling in mixed-type GaAs quantum wells.” Physical Review B 90, 035304 (2014). DOI: 10.1103/PhysRevB.90.035304
  4. Atif Imtiaz, Thomas Baldwin, Hans T. Nembach, Thomas M. Wallis, and Pavel Kabos. “Near-field microwave microscope measurements to characterize bulk material properties.” Applied Physics Letters 90, 243105 (2007). DOI: 10.1063/1.2748307

Conference proceedings:

  1. David Golter, Thomas K. Baldwin, and Hailin Wang. “Suppression of Spin Dephasing in Diamond NV Centers with Microwave-Dressed Spin States.” Conference on Lasers and Electro-Optics 2014, FW1B.3 (2014). DOI: 10.1364/CLEO_QELS.2014.FW1B.3
  2. Thomas K. Baldwin, Stephen McGill, and Hailin Wang. “Manybody-Correlated Tunneling in Mixed-Type Quantum Wells at High Magnetic Field.” Conference on Lasers and Electro-Optics 2013, QM2D.2 (2013). DOI: 10.1364/CLEO_QELS.2013.QM2D.2
  3. Thomas K. Baldwin, Shannon O'Leary, and Hailin Wang. “Electromagnetically Induced Transparency of Spin Ensembles in a Two-Dimensional Electron Gas.” Conference on Lasers and Electro-Optics 2012, QM3G.5 (2012). DOI: 10.1364/QELS.2012.QM3G.5
  4. Timothy M. Sweeney, Thomas Baldwin, and Hailin Wang. “Probing Heavy-Hole and Light-Hole Excitonic Beats in a GaAs Quantum well with Phase-Locked Raman Pulse Pairs.” Conference on Lasers and Electro-Optics 2010, QFI4 (2010). DOI: 10.1364/QELS.2010.QFI4

Volunteering

2018-present
Search and Rescue Volunteer
Portland Mountain Rescue, Portland, OR

Support-level member.

2010-2018
Search and Rescue Volunteer
Eugene Mountain Rescue, Eugene, OR

Support-level member.

  • Helped organize practice sessions in backcountry navigation, snow travel, and low-angle rope systems.
  • Served on board of directors as training coordinator in 2017.
2003
Eagle Scout

Skills

Hobbies