👋🏼 Welcome, I’m Jiachen He!

Faraday Lab overlook — *Take a look at where I work.*

👨‍💻 Final-year Ph.D. candidate in physics at the University of Kentucky, specializing in open quantum systems, optical metrology, and magnetic field design.

🔬 Engaged in cutting-edge research on optical and magnetic systems, with a focus on the magneto-optic effect, advanced data acquisition / analysis techniques, and the development of high-precision instrumentation.

🎓 Currently working on a Ph.D. dissertation that involves developing a sensitive optical magnetometer using the resonant Faraday effect. Additionally, extensive work has been done on Python-based systems for synchronous data acquisition and designing a Merritt coil system for active magnetic field cancellation.

🎯 Driven by a passion for integrating machine learning, quantum technology, and engineering expertise to streamline scientific workflows. Proficient in Python, C++, and a suite of tools, applying them to innovate across hardware and software development while pushing the boundaries of experimental precision.

About the Faraday Lab

📽️ Click here if you want to learn more about the Faraday Lab.

Selected Experience

🔧 Scientific Software Development

Strong background in scientific programming, personally developed and maintained several Python packages that contribute to scientific research, including:

Faraday Rotation Data Analysis: A tool for analyzing rotation measurements with high sensitivity, crucial for advanced magnetometry.
Synchronous Data Acquisition: A modular system that facilitates seamless communication between scientific instruments, such as wavelength meters, laser controllers, and lock-in amplifiers using Python

You can explore all my software contributions on my GitHub profile, where I promote transparency and collaboration in scientific research.

🌀 Optical Metrology

Expert in polarization modulation ellipsomtry, with particular emphasis on system setup, calibration, and optimization. Using lock-in amplifiers, Muller calculus, and waveform analysis, I have achieved sub-μrad accuracy in measuring sensitive optical signals.

🔦 Laser Frequency Stabilization

Extensive experience in laser locking, employing advanced techniques such as Pound-Drever-Hall locking and Doppler-free saturated absorption spectroscopy in complex optical systems to achieve precise frequency control.

Merrit coil system — *Compact magnetic field design and engineering.*

🧲 Magnetic Field Design

Designed and developed a Merritt coil system for generating uniform magnetic fields, utilizing Python and finite element analysis (COMSOL).
Collaborated closely with machine shop teams to build and test the system, which plays a critical role in my research on active magnetic field cancellation.

🧊 Cryogenic and Vacuum Systems

Contributed to system calibration and maintenance of a cryogenic system, gaining hands-on experience with vacuum technologies over five years.

🖥️ Professional Experience

As a Graduate Research Assistant at the University of Kentucky, I have led and contributed to numerous research projects focused on optical alignment, polarization modulation, and magnetic field optimization. I have worked closely with cross-functional teams to design and implement custom experimental setups using state-of-the-art optical and laser technologies.

Chem-Phys Bldg, University of Kentucky — *My favorite view of the Chem-Phys Bldg at University of Kentucky.*

📚 Education

Ph.D. in Physics, University of Kentucky (Expected Graduation: May 2025)
M.S. in Physics, University of Kentucky
B.E. in Measurement Control Technology and Instruments, Shenzhen University

📜 Publications and Presentations

Electric Charging Effects on Insulating Surfaces in Cryogenic Liquids, Review of Scientific Instruments.
Faraday Rotation Measurements in Potassium Vapor Cells, presented at the American Physical Society April Meeting, 2024.

🤝 Looking for Collaborations?

I am always eager to explore new research collaborations and share knowledge in fields such as optics, laser technology, magnetic systems, quantum technology and scientific computing.

Feel free to browse my repositories and reach out to me for potential collaborations or discussions on scientific software development.

👨‍💻 Connect with me: