Hyunseok (Dan) OhQuantum Hardware Engineer

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Hyunseok (Dan) Oh

Quantum Hardware Engineer

Hands-on experience across multiple qubit platforms.

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Portrait of Hyunseok Oh, Quantum Hardware Engineer

About

Toward the Quantum Future

Quantum technology has been shifting from an abstract idea into an engineered system. I want to keep building the hardware that makes it real.

Experience

A Coherent Trajectory

  1. Google Quantum AISep 2026 — Present

    Calibration Engineer

    • Quantum Sensing and Imaging Group, UCSBOct 2020 — Sep 2026

      Graduate Student Researcher

      • Optimized mechanical resonator designs with COMSOL, cutting simulation time 10x via a parallelized HPC pipeline
      • Developed a diamond smart-cut fabrication process, achieving 100x scalability and 3x faster throughput
      • Characterized devices in a dilution refrigerator, using an automated Python framework
    • Hallym Medical A.I. CenterApr 2020 — Jul 2020

      A.I. Research Engineer

      • Implemented a nine gaze estimation machine learning model for strabismus diagnosis
    • Quantum Information and Quantum Computing Lab, SNUAug 2019 — Feb 2020

      Undergraduate Student Researcher

      • Constructed the RF voltage stabilizing system for trapped ion qubits
    • Integrated Quantum Systems Lab, SNUMar 2017 — Aug 2019

      Undergraduate Student Researcher

      • Developed an automated algorithmic framework for NV center magnetometry signal processing
      • Implemented a real-time adaptive feedback system for quantum dot qubits

    Professional Skills

    An Engineer's Toolkit

    Fabrication

    6 years · UCSB Nanofabrication Facility

    Flip-chip & wafer bondingLithography (MLA, E-beam)Deposition (ALD, PECVD, Sputter)Dry etch (ICP, Ion mill, XeF2, VHF)Imaging (AFM, SEM)DicingThermal processing

    Characterization

    Dilution refrigerator cryogenicsTelecom band fiber opticsConfocal microscopyMicrowave & RF measurement

    Simulation & Design

    COMSOL MultiphysicsSonnetQuTiPQiskitHPC pipelines

    Instrumentation & Control

    PyQt5PyVISAXilinx VivadoLabVIEW FPGA Module

    Programming

    Proficient
    PythonCJavaMATLABLabVIEWVerilog
    Familiar
    C++VHDLScalaOCamlMathematicaHTMLCSSJavaScriptJulia

    Research

    Selected Projects

    SEM micrograph of a suspended diamond optomechanical crystal nanobeam with a periodic array of holes
    1.9 × 106mechanical Q

    High-Q diamond optomechanics with preserved spin coherence

    Spin-embedded diamond optomechanical crystals featuring a mechanical quality factor of 1.9 × 106 with long spin coherence.

    Quantum Sensing and Imaging Group, UCSBLearn More
    Spectroscopy plot showing sharp resonance peaks for individual nuclear spins around a diamond NV center
    14nuclear spins resolved

    Automated nuclear spin detection in diamond

    An automated algorithm that resolved 14 individual nuclear spins around a diamond NV center from real experimental data.

    Integrated Quantum Systems Lab, SNULearn More

    Publications

    Peer-Reviewed Work

    1. 01

      Quantum nanophotonic interface for tin-vacancy centers in thin-film diamond

      H. Lee, H. C. Kleidermacher, A. J. M. Stein, H. Oh, L. B. H. Wyatt, C. K. Kim, L. Basso, A. M. Mounce, Y. Wang, S. S. Su, M. Titze, A. C. B. Jayich, J. Vučković

      Phys. Rev. Appl. 25, 044074 (2026)

    2. 02

      Spin-embedded diamond optomechanical resonator with a mechanical quality factor exceeding one millionFeatured

      H. Oh, V. Dharod, C. Padgett, L. B. H. Wyatt, J. Venkatraman, S. Parthasarathy, E. Osipova, I. Hedgepeth, J. V. Cady, L. Basso, Y. Wang, M. Titze, E. S. Bielejec, A. M. Mounce, D. Bouwmeester, A. C. B. Jayich

      Optica 13, 485–490 (2026)

    3. 03

      Integrated phononic waveguide on thin-film lithium niobate on diamond

      S. Malik, F. M. Mayor, W. Jiang, H. Oh, C. Padgett, V. Dharod, J. Venkatraman, A. C. B. Jayich, A. H. Safavi-Naeini

      Appl. Phys. Lett. 127, 154001 (2025)

    4. 04

      Single-spin readout and quantum sensing using optomechanically-induced transparency

      M. Koppenhöfer, C. Padgett, J. V. Cady, V. Dharod, H. Oh, A. C. B. Jayich, A. A. Clerk

      Phys. Rev. Lett. 130, 093603 (2023)

    5. 05

      Deep learning enhanced individual nuclear-spin detection

      K. Jung, M. H. Abobeih, J. Yun, G. Kim, H. Oh, H. Ang, T. H. Taminiau, D. Kim

      npj Quantum Inf. 7, 41 (2021)

    6. 06

      Algorithmic decomposition for efficient multiple nuclear spin detection in diamondFeatured

      H. Oh, J. Yun, M. H. Abobeih, K. Jung, K. Kim, T. H. Taminiau, D. Kim

      Sci. Rep. 10, 14884 (2020)

    Presentations

    Talks & Posters

    Talks

    Posters

    Education

    Academic Foundations

    University of California, Santa Barbara campus
    University of California, Santa BarbaraOct 2020 — Sep 2026
    • Ph.D. in Physics, Sep 2026
    • M.A. in Physics, Sep 2023
    Advisor
    Prof. Ania C. Bleszynski Jayich
    Thesis
    “Towards diamond spin-opto-mechanical systems: Design, fabrication, and characterization of optomechanical crystals with embedded spins”
    Seoul National University campus
    Seoul National UniversityMar 2013 — Feb 2020
    • B.S. in Physics, Feb 2020
    • B.S. in Computer Science and Engineering, Feb 2020

    Summa Cum Laude

    Advisor
    Prof. Dohun Kim
    Thesis
    “Development of a program for efficient detection of nuclear spins using the diamond NV center”

    Honors, Awards & Fellowships

    Distinctions & Funding

    Awards

    • John Cardy Award2021
      University of California, Santa Barbara

    Fellowships

    • Government Scholarship for Overseas Study2020 — 2022
      National Institute for International Education
    • Presidential Science Scholarship2013 — 2018
      Korea Student Aid Foundation

    Contact

    Let's build the quantum future

    Open to conversations about quantum hardware, device fabrication, and what comes next. Reach out directly or find me across the web.

    Emailhyunseok0222@gmail.com
    LinkedInin/hyunseok0222
    GitHubhyunseokOh
    Google ScholarCitations
    ORCID0000-0003-0076-3844

    Hyunseok (Dan) Oh · Quantum Hardware Engineer