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About

Research scientist and freelance developer working where wave physics, computational electromagnetics and open-source scientific software meet.

Portrait of Benjamin Vial

I'm a research scientist and software developer based in France. My work sits at the intersection of wave physics and computational engineering, where I build open-source numerical tools and use them to explore how electromagnetic and mechanical waves behave in structured materials.

I received my Master's degrees in Engineering from Centrale Marseille and in Physics from Aix Marseille University in 2009. I then joined the Fresnel Institute (CNRS), where I pursued a PhD in collaboration with Silios Technologies. My thesis focused on the theoretical, numerical and experimental study of electromagnetic metamaterials using a modal approach, applied to infrared multispectral filtering. I received my PhD from Centrale Marseille in April 2013.

After two postdoctoral positions at the Fresnel Institute (first on ray tracing in complex media, then on resonant optical antennas), I moved to London in 2014 to join the Antennas and Electromagnetics group at Queen Mary, University of London. Over eight years there I worked on topology optimization for invisibility cloaks, machine-learning-driven inverse design, and the homogenization of ferroelectric metamaterials for tunable microwave devices.

From 2022 to 2025 I was a Postdoctoral Research Assistant at Imperial College London in the Department of Mathematics, where I worked on high-frequency homogenization of dispersive media for vibration energy harvesting with metamaterials. Since late 2025 I work independently as a freelance software developer, consulting and building open-source tools for photonics and electronics (including gsim, a GDSFactory plugin for full-wave electromagnetic simulation).

Download CV (PDF)

Positions

  1. Oct. 2025 – present

    Freelance software developer

    Bras, France

    Consulting and open-source software development. Contributing to gsim, a GDSFactory plugin for full-wave electromagnetic simulation in photonics and electronics.

  2. Aug. 2022 – Aug. 2025

    Research Associate

    Imperial College London

    METAVEH project: high-frequency homogenization in dispersive media for vibration energy harvesting with metamaterials.

  3. Jan. 2019 – Jul. 2022

    Research Assistant

    Queen Mary, University of London

    ANIMATE project: nonlinear coupling and homogenization of ferroelectric metamaterials, inverse design for tunability, microwave and THz material characterization.

  4. Jan. 2017 – Dec. 2018

    Research Assistant

    Queen Mary, University of London

    AOTOMAT project: optimization tools and machine learning for the design of electromagnetic devices and materials.

  5. Jul. 2014 – Dec. 2016

    Research Assistant

    Queen Mary, University of London

    QUEST project: transformation optics applied to invisibility cloaks and metamaterial-based devices. Simulation tools and topology optimization for exotic material properties.

  6. Nov. 2013 – Jan. 2014

    Research Assistant

    Institut Fresnel, Marseille

    Resonant optical antennas: coupling of light to subwavelength particles, modal analysis of electric and magnetic resonances for emission pattern shaping.

  7. May 2013 – Oct. 2014

    Research Assistant

    Institut Fresnel, Marseille

    Ray tracing in complex media, inverse index distribution problems, deshomogenization with graded-index photonic crystals.

  8. Oct. 2009 – Apr. 2013

    PhD in Physics

    Institut Fresnel and Silios Technologies

    Study of open electromagnetic resonators by modal approach (CIFRE scholarship). FEM eigenmode analysis of bi-periodic diffractive structures. Design, fabrication and characterization of metamaterial-based infrared filters.

  9. Apr. 2009 – Sept. 2009

    MS research internship

    LMA, CNRS, Marseille

    Model order reduction of reed instruments for sound synthesis via proper orthogonal decomposition.

Education

  1. Apr. 2013

    PhD in Physics

    Institut Fresnel, CNRS, Centrale Marseille

    Optics, Photonics and Image Processing

  2. Oct. 2009

    Master's degree in Physics

    Centrale Marseille / LMA, CNRS

    Mechanics, Physics and Engineering, specialization in Acoustics

  3. Oct. 2009

    Master's degree in Engineering

    Centrale Marseille

    High-level scientific and technical training

Teaching and supervision

  1. Feb. 2023 – Sept. 2023

    PhD co-supervision

    Imperial College London

    Visiting student from Politecnico di Milano. Isospectral open cavities and curvilinear homogenization.

  2. Jul. 2023 – Sept. 2023

    Summer project supervision

    Imperial College London

    Applied mathematics undergraduate project on optimizing dispersion in discrete phononic lattices (3 months).

  3. 2019

    Teaching assistant

    Queen Mary, University of London

    Quantum Programming: lectures, tutorials and coding projects in Q# and Python for 10 Master students.

  4. Sept. 2018 – Apr. 2022

    PhD co-supervision

    Queen Mary, University of London

    Data-driven optimization of metasurfaces (2 PhD students).

  5. Nov. 2018 – Apr. 2019

    Undergraduate project co-supervision

    Queen Mary, University of London

    Multidisciplinary project on detecting emotions with physiological and microwave measurements (4 students).

  6. 2012

    Internship supervisor

    Institut Fresnel, CNRS

    Optimization of diffractive infrared filters for multispectral imaging (1 engineering student, 6 months).

  7. 2011

    Project tutor

    Institut Fresnel, CNRS

    Design of high-efficiency solar cells with metamaterials (5 students, 2 months).

Awards

  1. 2014

    Best PhD Thesis 2013

    Doctoral School 352, Physics and Condensed Matter Science

  2. 2014

    Best PhD Thesis 2013

    CNano PACA, nanosciences and nanotechnologies cluster

    Finalized research category

Skills and interests

Languages
Python, Matlab, C, C++, Mathematica, Q#, LaTeX, HTML, CSS
Tools
git, FEniCS, COMSOL Multiphysics, Gmsh, GetDP, Gsolver, Gimp, LibreOffice, Labview
Spoken
French (mother tongue), English (fluent), Spanish (basic)
Interests
Optics, photonics, metamaterials, wave physics, light-matter interaction, homogenization, computational electromagnetics, optimization, inverse design, finite element and Fourier modal methods, machine learning, transformation optics, open-source science
Outside work
Music, guitar, football, snowboard, hiking, traveling, cooking