A5067952375- Advanced Fiber Laser Technologies
- Photonic and Optical Devices
- Semiconductor Lasers and Optical Devices
- Geotechnical Engineering and Analysis
- Photorefractive and Nonlinear Optics
- Mechanical and Optical Resonators
- Advanced Fiber Optic Sensors
- Geotechnical and Geomechanical Engineering
- Geotechnical Engineering and Underground Structures
- Advanced Fluorescence Microscopy Techniques
- Photoacoustic and Ultrasonic Imaging
- Advanced Semiconductor Detectors and Materials
- Geotechnical Engineering and Soil Stabilization
- Civil and Structural Engineering Research
- Geodetic Measurements and Engineering Structures
- Solid State Laser Technologies
- Acoustic Wave Resonator Technologies
- Optical Coherence Tomography Applications
- Laser Design and Applications
- Nonlinear Photonic Systems
- Photonic Crystal and Fiber Optics
- Infrared Target Detection Methodologies
- Structural mechanics and materials
- Advanced Photonic Communication Systems
- Advanced MEMS and NEMS Technologies
École Polytechnique Fédérale de Lausanne
2018-2025
ITMO University
2021-2024
Eurogentec (Belgium)
2023
Russian Academy of Sciences
2007-2019
Institute of Semiconductor Physics
2003-2019
Gersevanov Research Institute of Bases and Underground Structures
1966-1977
Université Grenoble Alpes
1966
Bringing efficient second-order nonlinear effects in integrated photonics is an important task motivated by the prospect of enabling all possible optical functionalities on chip. Such has proved particularly challenging silicon photonics, as materials best suited for photonic integration lack susceptibility ($\chi^{(2)}$). Methods inducing effective $\chi^{(2)}$ such have recently opened new opportunities. Here, we present optically reconfigurable quasi-phase-matching large radius...
Abstract Super-resolution microscopies based on the localization of single molecules have been widely adopted due to their demonstrated performance and accessibility resulting from open software simple hardware. The PAINT method for microscopy offers improved resolution over photoswitching methods, since it is less prone sparse sampling structures provides higher precision. Here, we show that waveguides enable increased throughput data quality PAINT, by generating a highly uniform ~100 ×...
We have designed and fabricated a hybrid integrated laser source with full C-band wavelength tunability high-power output. The external cavity is composed of gain chip dual micro-ring narrowband filter on the silicon nitride photonic to achieve tuning range 55 nm SMSR higher than 50 dB. Through integration semiconductor optical amplifier in miniaturized package, exhibits an output power 220 mW linewidth narrower 8 kHz over C-band. Such high-power, narrow-linewidth diode compact low-cost...
The increasing demand for high pixel acquisition rates in the fields of augmented reality, autonomous driving, and robotics has led to a growing interest solid-state beam scanning solutions that do not rely on moving parts. As result, modern photonics been driving development passive steering technology meet these demands. Recently demonstrated imagers based focal plane arrays, nanophotonic metasurfaces, optical phased arrays have enabled unprecedented resolutions measurement speeds....
Stoichiometric silicon nitride is a highly regarded platform for its favorable attributes, such as low propagation loss and compatibility with complementary metal-oxide-semiconductor technology, making it prominent choice various linear nonlinear applications on chip. However, due to amorphous structure, lacks second-order nonlinearity; hence, the misses key functionality of electro-optical modulation photonic integrated circuits. Several approaches have been explored address this problem,...
Stoichiometric silicon nitride (Si
A broadband visible blue-to-red, 10 GHz repetition rate frequency comb is generated by combined spectral broadening and triple-sum generation in an on-chip silicon nitride waveguide. Ultra-short pulses of 150 pJ pulse energy, via electro-optic modulation a 1560 nm continuous-wave laser, are coupled to waveguide giving rise near-infrared supercontinuum. Modal phase matching inside the allows direct transfer supercontinuum into wavelength range covering more than 250 THz from below 400 above...
We propose a hybrid integrated self-injection locked (SIL) narrow linewidth laser with adjustable feedback intensity. An Sagnac loop reflector (ASLR) coupled to high- <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Q</i> micro-ring resonator is introduced adjust and optimize the optical intensity of SIL laser. The experimental results show that tuning performance are closely related After optimizing reflectivity ASLR, more excellent frequency...
The availability of nonlinear parametric processes, such as frequency conversion in photonic integrated circuits is essential. In this contribution, we demonstrate a highly tunable second-harmonic generation fully complementary metal-oxide-semiconductor (CMOS)-fabrication-compatible silicon nitride platform. We induce the second-order nonlinearity using an all-optical poling technique with light generated fundamental mode, and narrow quasi-phase matching (QPM) spectrum by avoiding...
Integrated entangled photon-pair sources are key elements for enabling large-scale quantum photonic solutions and address the challenges of both scaling-up stability. Here we report first demonstration an energy-time source based on spontaneous parametric down-conversion in silicon-based platform-stoichiometric silicon nitride (Si3N4)-through optically induced second-order (χ(2)) nonlinearity, ensuring type-0 quasi-phase-matching fundamental harmonic its second-harmonic inside waveguide. The...
Silicon nitride (Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> ) has a higher nonlinear threshold compared to silicon, which reduces the effect of two-photon absorption. However, low thermo-optic coefficient and reduced refractive index contrast thin Si waveguides lead thermal tuning speed efficiency. This paper demonstrates widely tunable III-V/Si hybrid-integrated external...
Optical parametric oscillators enable the conversion of pump light to new frequency bands using nonlinear optical processes. Recent advances in integrated photonics have led creation compact, chip-scale sources via Kerr-nonlinearity-induced oscillations. While these provided broadband wavelength tuning, ability tune emission dynamically altering dispersion has not been attained so far. Here we present a voltage-tunable, on-chip oscillator based on an alternating-dispersion dimer, allowing us...
Single-molecule localization microscopy (SMLM) is a powerful tool that routinely used for nanoscale optical imaging of biological samples. Recently, this approach has been applied to study optically active defects in two-dimensional (2D) materials. Such can not only alter the mechanical and optoelectronic properties 2D materials but also bring new functionalities, which make them promising platform integrated nanophotonics quantum sensing. Most SMLM approaches, however, provide field view...
Chip-scale optical frequency combs enable the generation of highly-coherent pulsed light at gigahertz-level repetition rates, with potential technological impact ranging from telecommunications to sensing and spectroscopy. In combination techniques such as dual-comb spectroscopy, their utilization would be particularly beneficial for molecular species in mid-infrared spectrum, an integrated fashion. However, few demonstrations direct microcomb within this spectral region have been showcased...
We present a III-V/Si 3 N 4 hybrid-integrated tunable laser. The laser shows record of ~170-nm tuning range with side mode suppression ratio above 64 dB and an intrinsic linewidth below 2.8 kHz.
All-optical poling enables reconfigurable and efficient quasi-phase-matching for second-order parametric frequency conversion in silicon nitride integrated photonics. Here, we report broadly tunable milliwatt-level second-harmonic generation a small free spectral range microresonator, where the pump its are both always on fundamental mode. By carefully engineering light coupling region between bus simultaneously achieve critical of as well extraction from cavity. Thermal tuning is...
We analyze a delay differential equation model for swept semiconductor laser and demonstrate existence of various periodic solutions that are subharmonically locked to the sweep rate. These provide optical frequency combs in spectral domain. investigate problem numerically show that, due translational symmetry model, there exists hysteresis loop formed by branches steady states solutions, bridges connecting stable unstable state branches, isolated limit cycles. discuss role bifurcation...
We propose and demonstrate a feedback tunable self-injection locked (SIL) narrow linewidth laser, the light intensity is dynamically adjusted to find best locking state. The laser composed of distributed (DFB) semiconductor high quality (Q) factor silicon nitride (SiN) external cavity, sagnac loop reflector used achieve arbitrary ratio output on basis add-drop type Q microring resonator (MRR). results show that SIL state closely related light. When optical higher than -14 dB, robust can be...
We introduce a high-performance external cavity diode laser constructed with AlGaAs-Si <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> N xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> hybrid integration, exhibiting narrow linewidth of 18 kHz, tuning range 62.9 nm, and side mode suppression ratio better than 45 dB.