Ilia L. Rasskazov

Ilia L. Rasskazov

Computational Physicist•Simulation infrastructure for physical science

I build the simulation software that scientific and engineering teams make decisions with.

Google ScholarLinkedInmultilayer.appEmail
49publications
1,187citations
21h-index
200+peer reviews

About

Twelve years of taking physics-based models from theory into production, split between academia and industry. At Tandem PV I develop a new class of bankable simulation software for perovskite-silicon tandem modules — models that do not only have to be right, they have to survive independent third-party technical due diligence before anyone will underwrite the technology. I process and analyse outdoor field data, build and calibrate the underlying physical models, and feed the results back into device design.

Before that: large-scale electromagnetic simulation on HPC clusters and cloud at KLA, and inverse design of manufacturable low-emissivity coatings at SunDensity.

The thread through all of it is infrastructure. I write tools that other people use — an open-source scattering package the community cites as working tooling, and a thin-film optics platform that checks published spectra against recomputed ones. Recent research applies deep learning to measurement inversion in infrared microspectroscopy: physics-informed ML as a solver for the physics, not a replacement for it.

Software

multilayer.app

Thin-film optics platform built on a transfer-matrix core, with a replication engine that recomputes spectra from published papers and scores reproduction fit against digitized curves — span-normalized RMSE with a maximum-deviation guard, plus provenance grading of every optical input.

Python, FastAPI, React, Pyodide/WASM

STRATIFY

Open-source MATLAB package for electromagnetic scattering by multilayered spheres. Adopted by the light-scattering community as working tooling.

OSA Continuum 3, 2290 (2020) – 58 citations

Selected publications

Transfer-Matrix Framework for Modeling Mid-Infrared Vibrational Circular Dichroism SpectraCover
A. Utyushev, I. L. Rasskazov, and Y. Phal
Analytical Chemistry, 98, 10584–10593 (2026)
Plasmon-enhanced downshifting and downconversion: Fundamentals and applications in photovoltaicsInvited
A. Joshi and I. L. Rasskazov
Reviews in Physics, 12, 100096 (2024)
Perovskite photonic crystal photoelectric devicesFeatured
Y. Ji, W. Xu, I. L. Rasskazov, H. Liu, J. Hu, M. Liu, D. Zhou, X. Bai, H. Agren, and H. Song
Applied Physics Reviews, 9, 041319 (2022)
Collective lattice resonances: Plasmonics and beyondInvitedEditor's Choice
A. D. Utyushev, V. I. Zakomirnyi, and I. L. Rasskazov
Reviews in Physics, 6, 100051 (2021)
Extraordinary fluorescence enhancement in metal-dielectric core-shell nanoparticlesCover
I. L. Rasskazov, A. Moroz, and P. S. Carney
Journal of Physical Chemistry Letters, 12, 6425–6430 (2021)
STRATIFY: a comprehensive and versatile MATLAB code for a multilayered sphere
I. L. Rasskazov, P. S. Carney, and A. Moroz
OSA Continuum, 3, 2290–2309 (2020) · code

All 47 publications →

Experience

Senior R&D Engineer
Tandem PV, San Jose, CA
2025 — present
Associate Editor
ResearchHub Foundation, remote
2025 — present
Lead Computational Modeling & Simulation Engineer
SunDensity, Rochester, NY
2023 — 2025
Research Scientist
KLA, Milpitas, CA
2022 — 2023
Scientist / Postdoctoral Research Associate
University of Rochester
2018 — 2022
Postdoctoral Research Associate
University of Illinois Urbana-Champaign
2016 — 2018

Education

PhD, Physics and Optics
Siberian Federal University
2015
MSc, Engineering Physics
Siberian Federal University
2011
BSc, Engineering Physics
Siberian Federal University
2009

Service & recognition

200+ manuscripts reviewed for Nature Portfolio, ACS, Optica, Wiley, Elsevier and SAGE. Associate Editor at the ResearchHub Foundation.

Co-advised PhD students at KTH (Sweden), UIUC, and Colorado School of Mines.