Mathieu Bertrand

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Menu: Research | Teaching | Projects | Scientific Output | Side Projects | MOW & POW | About me

______________________________________________________________________________

Research

In the QOE group, my research focuses on mid-IR QCLs and more specifically on comb emitting devices.

A few keywords to define my different research axes:

Comb characterization
Dual Comb experiment
Pulses and Supercontinuum generation
RF properties enhancement
Fast switching devices
Linewidth related measurement
Harmonic Comb Generation
Laser Stabilization
Gaz detection
Surface Emitting devices
Low Dissipation devices
Ultra stable devices

Also related to the different axes but not primary research: spectroscopy, FTIR, fast data processing, experimental setup enhancement, automation, and automated tests.

Teaching

@ ETH 2020: - present

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! Semester ! Courses                                                   !
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! FS 20    ! Quantum Optics with Metamaterials and Photonic Crystals   !
!          ! Resp.: Prof. Scalari                                         !
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! HS 20    ! Physikpraktikum P1+P2                                     !
!          !      -> Exp. 8 Tragflügelmodel                            !
!          !      -> Exp. 43 Mikrowelle                                !
!          !      -> Exp. 91 Surface Tension & Water Jet               !
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! FS 21    ! Physikpraktikum P3+P4                                     !
!          !      -> Intersubband transitions                          !
!          ! Resp.: Prof. Donega                                          !
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! HS 21    ! Physikpraktikum P3+P4                                     !
!          !      -> Intersubband transitions                          !
!          !      -> Mach-Zehnder Interferometer                       !
!          ! Resp.: Prof. Donega                                          !
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! FS 22    ! Group IT Responsible                                      !
! HS 22    !      -> PRC, Group Website management                     !
! FS 23    !      -> Computers, IT infrastructure management           !
! HS 23    !      -> Organisation of IQCLSW 2022                       !
! FS 24    !      -> Design of experiments of the Nacht Der Physik     !
------------------------------------------------------------------------

@ Polytech' Grenoble: 2017 - 2019

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! Semester ! Courses                                                   !
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! FS+HS 18 ! Electromagnetism L3: exercice sessions + lab work         !
!          ! Resp.: Prof. Basrour                                         !
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! FS+HS 19 ! Electromagnetism L3: exercice sessions + lab work         !
!          ! Resp.: Prof. Basrour                                         !
------------------------------------------------------------------------

Scientific Output

My latest published articles as (co)author:

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! Year ! Topic           ! Title                                        ! DOI  ! ArXiv !
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! 2024 ! Mid-IR QCLs     ! Measurement of sub-Poissonian shot noise     ! here !       !
!      ! QCD             !  in a quantum cascade detectors              !      !       !
----------------------------------------------------------------------------------------
! 2024 ! Mid-IR QCLs     ! Quantum Cascade Surface Emitting Lasers      ! here !       !
!      !                 !                                              !      !       !
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! 2023 ! Mid-IR QCLs     ! Coherence analysis of tightly locked         !      ! here  !
!      ! NIR Injection   ! Mid-IR QCL frequency combs                   !      !       !
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! 2023 ! Mid-IR QCLs     ! Quantum walk comb in a fast gain laser       ! here ! here  !
!      ! Quantum Walk    !                                              !      !       !
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! 2023 ! Mid-IR QCLs     ! Coherent Control of Mid-Infrared Frequency   !      ! here  !
!      ! NIR Injection   ! Comb by Optical Injection of NIR Light       !      !       !
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! 2023 ! Mid-IR QCLs     ! Asynchronous upconversion sampling of        ! here !       !
!      ! ASUPS           ! frequency modulated combs                    !      !       !
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! 2023 ! Mid-IR QCLs     ! Frequency chirped Fourier-Transform          ! here !       !
!      ! FTIR            ! spectroscopy                                 !      !       !
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! 2023 ! Mid-IR QCLs     ! Sensitive dependence of the linewidth        ! here !       !
!      !                 ! enhancement factor in QCLs                   !      !       !
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! 2022 ! Mid-IR QCLs     ! Intensity correlations in quantum cascade    ! here !       !
!      ! Harmonic Combs  ! laser harmonic frequency combs               !      !       !
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! 2022 ! Mid-IR DFBs     ! High-Power, Narrow-Linewidth DFB QCL         ! here !       !
!      ! QCLs            ! for Molecular Spectroscopy                   !      !       !
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! 2022 ! Mid-IR QCLs     ! Glass-in-glass infiltration for 3D           ! here !       !
!      !                 ! micro-optical composite components           !      !       !
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! 2022 ! Mid-IR QCLs     ! Synchronization of frequency combs by        ! here ! here  !
!      !                 ! optical injection                            !      !       !
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! 2022 ! Mid-IR QCLs     ! Quantum cascade laser absorption             !      !       !
!      !                 ! spectrometer with a low temperature          ! here !       !
!      !                 ! multipass cell for precision clumped CO2     !      !       !
!      !                 ! measurement                                  !      !       !
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! 2021 ! GeSn            ! Progress in Germanium Tin (GeSn)             ! here !       !
!      !                 ! photonic crystal lasers                      !      !       !
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! 2021 ! Mid-IR QCLs     ! Controlling Quantum Cascade Laser Optical    ! here ! here  !
!      !                 ! Frequency Combs through Microwave Injection  !      !       !
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! 2021 ! Mid-IR QCLs     ! Femtosecond pulses from a mid-infrared       ! here ! here  !
!      !                 ! quantum cascade laser                        !      !       !
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! 2021 ! Metrology       ! SI-traceable frequency dissemination         ! here ! here  !
!      !                 ! at 1572.06 nm in a stabilized fiber network  !      !       !
!      !                 ! with ring topology                           !      !       !
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! 2021 ! Mid-IR QCLs     ! Mid-infrared quantum cascade laser frequency ! here ! here  !
!      !                 ! combs with a microstrip-like line waveguide  !      !       !
!      !                 ! geometry                                     !      !       !
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! 2021 ! GeSn            ! GeSn optical gain and lasing characteristics ! here !       !
!      !                 ! modelling                                    !      !       !
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For a complete overview of my scientific output, here is my Google Scholar profile.

Main Projects

Starting 1st of March 2024, I will be involved in the design, fabrication and measurement of low dissipation Surface Emitting QCL also called QCSEL. Stay tuned for more info!

Side Projects

Not strictly science related but brings something to the lab ;)

Master Oscillator
The goal is to distribute in all the lab a an optical signal that will be used as reference for all our home-made FTIR. For that I built a fiber network with constant monitoring of the reference laser.
MIR Laser database
With two Hilfassistant, a database of all the MIR mounted lasers has been created and filled.
0 Xing detection
Project in collaboration with D-ITET: implementation of a fast 0 crossing detection with Kalman filters on GPU for fast downsampling.
High resolution and sensitive MZ interferometer for low signal spectroscopy
Build a 40 dB SNR with a contrast >95% interferometer for low signal spectroscopy with a 400 MHz resolution.

MOW & POW

Stands for Music Of Week and Picture Of the Week because, why not?

Music

In Memories of a foggy day in Konstanz

Picture

Pringy's Castle (Fr) - Christmas 2022 - By me
Pringy With Fog

About Me

Physicist, french, 31 yo postdoc fellow at the Physics department of ETH in Prof. Faist group studying QCLs would define me at the moment in a professional way.

I am a graduate from the engineering school Grenoble-INP Phelma (France/Grenoble) where I specialized in semiconductor Physics and optoelectronics.

What drives me in research is the unknown and the challenges of solving problem.

Definitely a bike aficionado, I enjoy climbing two times a week, swimming when possible, böötlen, and playing squash.

I do enjoy design, architecture, calligraphy, nerdy stuffs, food and food with good wine.

Regarding other topic I enjoy discussing about languages, cultural differences, sociology, hockey and trains.

I can speak a bit of French, english, german and spanish.

CV available upon request.

LinkedIn: here (Fr, En, soon De)

Twitter: here (Fr, En, De, mix perso & work)

Cheers - Mathieu