Sylvain FINOT, PhD

About

Hello there 🌞, I'm currently a Research Engineer at IPVF, working on the development of ultrathin III-V solar cells.

🔬 I'm interested in microfabrication, modeling and characterization of semiconductor.
🎮 I like to play cooperative games with friends as a relaxing hobby.
🔧 Beginner in reverse engineering and game hacking.
🛠️ Interested in the latest high tech and new technology advancements.
🏠 Enjoys DIY and self-hosted homelab setups.
🤡 I also like Easter eggs.
(Proud ?) owner of onsenbatlesc*uilles.fr

You can check my PhD manuscript if you are interested in cathodoluminescence and/or LEDs characterization 😁.
Note : it's the same version that you can find on HAL but with working internal links.

Note : This website is still under construction 🚧.

Experience

Research Engineer Feb. 2023 – Present

Institut Photovoltaïque d'Île-de-France Palaiseau, France

Modeling, optimization and fabrication of ultrathin III-V solar cells.

Performed modelization and optimization of ultrathin III-V solar cells design using Rigorous Coupled-Wave Analysis and surrogate model optimization.
Developed microfabrication processes involving:
- wet and dry etching
- electron-beam, optical and nanoimprint lithography
- sol-gel SiO2 and porous SiO2 deposition by spin-coating
- electron-beam metal evaporation

Rigorous coupled-wave analysis Light-trapping Microfabrication Nanoimprint lithography Optical lithography Wet etching Dry etching SiO₂ sol-gel

PhD Student in Nanophysics Oct. 2019 – Nov. 2022

Université Grenoble Alpes at Institut Néel, CNRS Grenoble, France

Cathodoluminescence lifetime spectroscopy for efficient III-nitride LEDs. Supervisor: Gwénolé Jacopin

Characterized III-nitride LEDs using cathodoluminescence techniques.
Developed a Hanbury-Brown & Twiss interferometer to measure carrier lifetime at the nanoscale.
Studied crack effects on the optical properties of AlGaN/GaN microwires for core-shell UV LEDs.
Developed techniques to quantify surface recombinations at µLED sidewalls.
Fabricated and performed electro-optical characterization of single microwire UV LEDs.

Cathodoluminescence Lifetime Hanbury Brown & Twiss Simulations III-Nitride Light-Emitting Diodes Optoelectronics Microfabrication

Research Internship Mar. – July 2019

Institut Néel, CNRS Grenoble, France

Boosting blue nanoLED speed thanks to Purcell effect. Supervisor: Gwénolé Jacopin

Aimed to increase modulation speed of blue InGaN/GaN LEDs using the Purcell effect.
Achieved initial success with polar c-plane quantum wells.
Characterized core-shell microwire structures using temperature-dependent time-resolved cathodoluminescence to identify the most efficient design.
Studied speed enhancement after silver and aluminum coating on the optimal structure.

Cathodoluminescence Time-correlated cathodoluminescence Sputtering E-Beam deposition III-Nitride LEDs micro-wires

Research Internship May – July 2018

Diamfab & Institut Néel, CNRS Grenoble, France

Cathodoluminescence on epitaxial diamond layers for quality and doping assessment. Supervisors: Gauthier Chicot, David Eon

Conducted cathodoluminescence analysis of boron-doped diamond epitaxies grown by CVD to determine boron density and homogeneity using an empirical statistical law.
Developed Python software to automate data analysis and reporting.

Cathodoluminescence Diamond Doping density

Publications

You can also find my publications on google scholar or orcid.

M-plane AlGaN digital alloy for microwire UV-B LEDs 2023

L Valera, V Grenier, S Finot, C Bougerol, J Eymery, G Jacopin and C Durand Applied Physics Letters

DOI: 10.1063/5.0141568

UV-A to UV-B electroluminescence of core-shell GaN/AlGaN wire heterostructures 2022

V Grenier, S Finot, L Valera, J Eymery, G Jacopin and C Durand Applied Physics Letters

DOI: 10.1063/5.0101591

Surface recombinations in III-nitride micro-LEDs probed by photon-correlation cathodoluminescence 2021

S Finot, C Le Maoult, E Gheeraert, D Vaufrey and G Jacopin ACS photonics

DOI: 10.1021/acsphotonics.1c01339

Toward Crack-Free Core-Shell GaN/AlGaN Quantum Wells 2021

V Grenier, S Finot, B Gayral, C Bougerol, G Jacopin, J Eymery and C Durand Crystal Growth & Design

DOI: 10.1021/acs.cgd.1c00943

Carrier dynamics near a crack in GaN microwires with AlGaN multiple quantum wells 2020

S Finot, V Grenier, V Zubialevich, C Bougerol, P Pampili, J Eymery, P J Parbrook, C Durand and G Jacopin Applied Physics Letters

DOI: 10.1063/5.0023545

UV emission from GaN wires with m-plane core-shell GaN/AlGaN multiple quantum wells 2020

V Grenier, S Finot, G Jacopin, C Bougerol, E Robin, N Mollard, B Gayral, E Monroy, J Eymery and C Durand ACS Applied Materials & Interfaces

DOI: 10.1021/acsami.0c08765

Role of Underlayer for Efficient Core-Shell InGaN QWs Grown on m-plane GaN Wire Sidewalls 2020

A Kapoor, S Finot, V Grenier, E Robin, C Bougerol, J Bleuse, G Jacopin, J Eymery and C Durand ACS Applied Materials & Interfaces

DOI: 10.1021/acsami.9b19314

Conferences

Photon-Correlation Cathodoluminescence Spectroscopy in a SEM: A Tool to Analyze the Performance of Optoelectronics Devices 2022

S Finot, C Le Maoult, E Gheeraert, D Vaufrey and G Jacopin Microscopy & Microanalysis, Portland, USA

Carrier Dynamics Near a Crack in GaN Microwires with AlGaN Multiple Quantum Wells 2021

S Finot, V Grenier, V Zubialevich, C Bougerol, P Pampili, J Eymery, P J Parbrook, C Durand and G Jacopin International Conference on Defects in Semiconductors, Online

Hanbury Brown and Twiss in a SEM: Imaging Carrieer Lifetime at the Nanoscale in Ultrawide Bandgap Materials 2021

S Finot, V Grenier, V Zubialevich, C Bougerol, P Pampili, J Eymery, P J Parbrook, C Durand and G Jacopin MRS Spring Meeting & Exhibit, Online

Influence of the underlayer on the efficiency of InGaN quantum wells grown on m-plane GaN wire sidewalls 2019

S Finot, A Kapoor, V Grenier, E Robin, C Bougerol, J Bleuse, G Jacopin, J Eymery and C Durand Journées Nationales des Nanofils Semiconducteurs, Lyon, France

Skills

Fabrication and Processing

Optical lithography
Nanoimprint lithography
Basics of chemistry (cleaning, wet etching)
Dry etching (CCP and ICP RIE)
Electron-beam physical vapor deposition

Characterization and Analysis

Scanning Electron Microscopy
Cathodoluminescence (CW, time-correlated, time-autocorrelated)
Electroluminescence
Electron-beam-induced current
Electrical characterization (IV, solar cell IQE/EQE)
Ellipsometry
Profilometers (optical / contact)

Coding & Dev Tools

Python (simulation, automation, data analysis)
Matlab
SQL
Version control (Git)
Continuous integration (CI/CD)
Docker
Web development (HTML, CSS, JS)

Computational Tools

Computer assisted design (basics of Blender, Solidworks, Fusion, Klayout for GDS)
Office suite (Word, Excel, PowerPoint)
LaTeX

Education

PhD in Nanophysics 2019 – 2022

Université Grenoble Alpes Grenoble, France

Title : Cathodoluminescence lifetime spectroscopy for efficient III-nitride LEDs

Master’s Degree in Physics 2017 – 2019

Université Grenoble Alpes Grenoble, France

Magistère de physique. First year : Fundamental Physics. Second year : Matière quantique (Quantum Matter). Graduated with honors

Bachelor’s Degree in Physics 2014 – 2017

Université Savoie Mont Blanc Le Bourget-du-Lac, France

Physics. Graduated with highest honors