State University of New York at Binghamton

Ph.D Physics (Nonlinear Optics) — Dr. Bonggu Shim's Femtosecond Laser Spectroscopy Lab

Aug 2014 – Dec 2018

• GPA: 3.95/4.000
• Investigated experimental methods to control and characterize ultrafast nonlinear events:
  • Laser filamentation in solids and gases; inhibition of stochastic multi-filamentation; solitary wave generation
  • Two-color femtosecond time-resolved pump-probe experiments of harmonic generation in air
  • Femtosecond-laser-written waveguide fabrication in flexible Corning® Willow® glass
  • Second-harmonic generation polarimetry for crystal structure characterization of novel multiferroics (BiFeO₃)
• Developed visualization tools for ultrafast nonlinear events:
  • Digital in-line holography and frequency-domain holography for femtosecond time-resolved plasma measurements
  • Single-shot Michelson interferometry for refractive index evolution during waveguide fabrication
  • Tomographic interferometry for extracting 3D refractive index profiles of waveguides and optical fibers
• Modeled nonlinear laser pulse propagation by solving the UPPE (C++):
  • Corroborated experimental work on harmonic generation, filamentation, and mid-IR light bullet generation in solids

B.A. Physics  |  B.S. Integrative Neuroscience

Aug 2010 – May 2014

• GPA: 3.91/4.000 (Summa Cum Laude) — Evolutionary Biology minor
• Undergraduate Research Assistant — Dr. Charles Nelson: theoretical investigation of paraparticle processes
• Undergraduate Research Assistant — Dr. Michael Nizhnikov: effects of prenatal alcohol exposure on rat brain development

Onto Innovation, Hillsboro OR

Sr. Manager, Systems Engineering

Feb 2025 – Present

• Spearhead development of next-generation Aspect system, from concept through customer deployment
• Customer engagement to identify core requirements and translate them into engineering specifications
• Engineering management driving physics-based experimental and computational R&D paths
• Design and implementation of advanced optical architectures for semiconductor process control

Systems Engineering Manager

Feb 2023 – Feb 2025

• Led systems engineering efforts on the Aspect (Mid-IR ellipsometry) and Echo product lines
• Managed a team of engineers across experimental, computational, and product development functions
• Cross-functional leadership spanning engineering and product management for semiconductor metrology tools

Staff Systems Engineer

Apr 2022 – Feb 2023

• Led engineering and R&D of the Aspect Mid-IR ellipsometry product line
• Data analysis, numerical simulations, experimental design, and Lumerical electromagnetic modelling

Senior Systems Engineer

Jan 2019 – Apr 2022

• Developed process control instrumentation for Gen7 3D NAND and advanced semiconductor node structures
• Implemented Mueller/Jones matrix formalism for optical polarimetry signal modelling and analysis
• Major involvement in optical and hardware design, vendor interaction, and on-site customer fab installation
• Cross-functional collaboration across large engineering teams; trained manufacturing personnel

Physics Department, Binghamton University, NY

Ph.D Researcher — Femtosecond Laser Spectroscopy Lab

Aug 2014 – Dec 2018

• Conducted experimental and theoretical research in ultrafast nonlinear optics
• Developed novel spatial-temporal-spectral visualization techniques for femtosecond laser-matter interactions

American Environments Company Incorporated, Medford NY

Electromagnetic Compatibility (EMC) Test Engineer

Apr 2014 – Aug 2014

• Tested radiated/conducted emissions and susceptibility against industry standards (MIL-STD-461, EN 50081, etc.)
• Maintained and calibrated EMI equipment: scalar network analyzers, spectrum analyzers, and LISNs

Award for Excellence in Research

Binghamton University

Mar 2018

• Awarded annually to 10–15 graduate students (out of over 2,000) for significant research contributions

Semiconductor Packaging Best Oral Presentation Award

International Microelectronics Assembly and Packaging Society (IMAPS)

Jun 2017

• Best student oral presentation for “Fabrication and characterization of femtosecond laser-written waveguides in flexible glass” (scholarship provided)

George E. Moore Award for Academic Excellence in Physics

Binghamton University Department of Physics, Applied Physics, and Astronomy

May 2014

• Cash prize awarded to a senior undergraduate for excellent academic achievement (scholarship provided)

Scientific Journals

• R. I. Grynko et al., “Zonal measurements of oxide/nitride tier stacks in 3D NAND via mid-IR polarimetry and machine learning,” IEEE Transactions (2024).
• R. I. Grynko et al., “Non-destructive measurement of bottom width in deep trench isolation structures,” SPIE Proc. 12955, 1295514 (2024).
• R. I. Grynko et al., “Measurement of W recess profile in an advanced node 3D NAND using mid-IR ellipsometry,” SPIE Proc. 12496, 124961Z (2023).
• R. I. Grynko et al., “Ellipsometric critical dimension metrology employing mid-infrared wavelengths for high aspect ratio 3D NAND,” SPIE Proc. 11611, 116111O (2021).
• R. I. Grynko, G. C. Nagar et al., “Frequency-domain holography for single-shot measurements of nonlinear laser-matter interactions,” Opt. Lett. 45, 1252 (2020).
• R. I. Grynko, G. C. Nagar, and B. Shim, “Wavelength-scaled laser filamentation in solids and plasma-assisted sub-cycle light bullet generation in the long-wavelength infrared,” Phys. Rev. A 98, 023844 (2018).
• R. I. Grynko, D. L. Weerawarne, and B. Shim, “Effects of higher-order nonlinear processes on harmonic-generation phase matching,” Phys. Rev. A 96, 013816 (2017).
• R. I. Grynko, D. L. Weerawarne, X. Gao, H. Liang et al., “Inhibition of multi-filamentation of high-power laser beams,” Opt. Lett. 41, 4064 (2016).
• H. Liang, D. L. Weerawarne, P. Krogen, R. I. Grynko et al., “Mid-infrared laser filaments in air at a kilohertz repetition rate,” Optica 3, 678 (2016).
• H. Liang, P. Krogen, R. Grynko et al., “Three-octave-spanning supercontinuum generation and sub-two-cycle self-compression of mid-infrared filaments in dielectrics,” Opt. Lett. 40, 1069 (2015).

Conference Papers

• R. I. Grynko, G. C. Nagar, and B. Shim, “Sub-cycle light bullets in the long-wavelength infrared,” CLEO: 2018, OSA Technical Digest, paper JTu2A.132.
• R. I. Grynko, D. L. Weerawarne, X. Gao et al., “Multi-filament Inhibition and Resulting Solitary Wave Formation in Condensed Matter,” FIO: 2016, paper FF2C.1.
• G. C. Nagar, D. Dempsey, R. I. Grynko et al., “Laser direct writing of waveguides in flexible glass,” CLEO: 2018, paper JTu2A.3.
• D. Weerawarne, R. I. Grynko, H. J. Meyer, and B. Shim, “Significant Enhancement of Third- and Fifth-Harmonic Generation in Air via Two-Color Methods,” CLEO: 2015, paper FM3D.4.

Talks / Posters

• R. I. Grynko, “Control and visualization of highly nonlinear processes,” NIH — Colloquium at Plenz Critical Brain Dynamics Lab (2018). (talk)
• R. I. Grynko, “Studying crystal structures of ferroelectric materials using nonlinear optics,” Physics Journal Club, Binghamton University (2018). (talk)
• R. I. Grynko, “Fabrication and characterization of femtosecond laser-written waveguides in flexible glass,” IMAPS Semiconductor Packaging Symposium (2017). (talk — best student presentation award)
• R. I. Grynko et al., “How can we control nonlinear propagation of high-intensity laser pulses?”, CREATES Science to Technology Day, Binghamton University (2016). (poster)
• R. I. Grynko et al., “Solitary wave propagation in condensed matter,” ACS Northeast Regional Meeting (2016). (talk)

Language

Bilingual: English | Ukrainian — NY State Regents Proficiency: Spanish | French | Italian

Computer

C++ | Python | MATLAB | Mathematica | HTML | JavaScript | CSS | Arduino | Machine learning | Cluster computing

Interests

Scientific outreach, robotics, artificial intelligence, medicine