Publications

Journal Articles

2026

Femtosecond laser interaction with ULE® glass

G. Torun; Y. Bellouard 

Acta Materialia. 2026. Vol. 314. DOI : 10.1016/j.actamat.2026.122355.

Laser-based in situ monitoring of femtosecond-laser in-bulk processing of glass

M. Singleton; S. Lee; M. Bournazel; C. Cheayto; B. Tuzson et al. 

Optics Express. 2026. Vol. 34, num. 14, p. 26116 – 26127. DOI : 10.1364/OE.595492.

Three-dimensional Microstructuring of Chalcogenide Glass by Femtosecond Laser Exposure and Subsequent Chemical Etching

G. Torun; A. Yadav; R. Sharma; K. Richardson; Y. Bellouard 

International Journal of Applied Glass Science. 2026. Vol. 17, num. 3. DOI : 10.1111/ijag.70050.

UV femtosecond laser induced self-organisation of micro-structures in the bulk of fused silica

E. Gribaudo; Y. Bellouard 

Optics Express. 2026. Vol. 34, num. 7, p. 12822 – 12840. DOI : 10.1364/OE.592777.

Artificial embryonic node elucidates the role of flow in left-right symmetry breaking in vertebrates

T. u. Islam; I. Aggarwal; Y. Bellouard; P. R. Onck; J. M. J. den Toonder 

Science Advances. 2026. Vol. 12, num. 13. DOI : 10.1126/sciadv.aec2328.

2025

Fourier-plane spatial frequency modulation imaging: enhanced resolution imaging with a single, ultrashort pulse

O. Bernard; S. Cottrell; R. Bartels; Y. Bellouard; J. Squier 

Applied Optics. 2025. Vol. 64, num. 35. DOI : 10.1364/AO.573423.

Protein Distribution in Sba-15: Insights From Thermal Decomposition and Advanced Imaging

K. Vorm; C. Stathaki; P. L. Oseliero Filho; H. Mitsutake; T. S. Martins et al. 

MICROPOROUS AND MESOPOROUS MATERIALS. 2025. Vol. 401. DOI : 10.1016/j.micromeso.2025.113938.

In Memoriam: Prof. Reymond Clavel [RAM Society News]

A. Billard; M. Bouri; M. S. Sakar; J. Paik; A. Ijspeert et al. 

IEEE Robotics & Automation Magazine. 2025. Vol. 32, num. 3, p. 213 – 214. DOI : 10.1109/MRA.2025.3586085.

High-speed femtosecond UV laser writing of low-loss waveguides in fused silica

L. Ackermann; B. Hermann; D. Talán Echarri; E. Gribaudo; Y. Bellouard 

Optics Letters. 2025. Vol. 50, num. 8, p. 2506 – 2509. DOI : 10.1364/OL.557978.

Sub-micron elastic properties measurement of single laser-affected volume in fused silica

Y. Gaillard; A. Radhakrishnan; Y. Bellouard; F. Amiot 

Journal of Non-Crystalline Solids. 2025. Vol. 652, p. 123399. DOI : 10.1016/j.jnoncrysol.2025.123399.

Sub-wavelength femtosecond laser based nanostructuring of complex patterns in the bulk of fused silica

E. Gribaudo; M. Deckart; P. Vlugter; Y. Bellouard 

Optics Express. 2025. Vol. 33, num. 5, p. 11529 – 11540. DOI : 10.1364/OE.555038.

Glass multifocal microlens array through laser-induced topological transformation

S. Benketaf; M. Lentz; Y. Bellouard 

Optics Express. 2025. Vol. 33, num. 6, p. 13647 – 13659. DOI : 10.1364/OE.550321.

Individual nanostructures in an epsilon-near-zero material probed with 3D-sculpted light

B. Kantor; L. Ackermann; V. Deinhart; K. Hoeflich; I. De Leon et al. 

OPTICS EXPRESS. 2025. num. 27, p. 47800 – 47809. DOI : 10.1364/OE.541939.

2024

Wide-Field Polarimetric Second-Harmonic Imaging for Rapid and Nondestructive Investigation of Laser-Induced Crystallization Phenomena

S. Lee; T. Kishi; Y. Bellouard 

ACS Nano. 2024. Vol. 18, num. 36, p. 24929 – 24940. DOI : 10.1021/acsnano.4c05554.

High-magnification observation of flow and solidification processes of laser-melted metals in microchannels

S. HATA; H. HIDAI; S. ITOH; Y. Bellouard; S. MATSUSAKA 

The Proceedings of The Manufacturing & Machine Tool Conference. 2024. Vol. 2024.15. DOI : 10.1299/jsmemmt.2024.15.b17.

Influence of ionization and cumulative effects on laser-induced crystallization in multilayer dielectrics

R. Ricca; V. Boureau; Y. Bellouard 

Physical Review Materials. 2024. Vol. 8, num. 6. DOI : 10.1103/PhysRevMaterials.8.063402.

Femtosecond-laser direct-write photoconductive patterns on tellurite glass

G. Torun; A. Romashkina; T. Kishi; Y. Bellouard 

Physical Review Applied. 2024. Vol. 21, num. 1. DOI : 10.1103/PhysRevApplied.21.014008.

2023

Single-Layer Subwavelength Femtosecond-Laser-Induced Confined Nanocrystallization in Multistack Dielectrics

R. Ricca; Y. Bellouard 

Physical Review Applied. 2023. Vol. 19, num. 4. DOI : 10.1103/PhysRevApplied.19.044035.

Formation Mechanism of Elemental Te Produced in Tellurite Glass Systems by Femtosecond Laser Irradiation

G. Torun; T. Kishi; D. Pugliese; D. Milanese; Y. Bellouard 

Advanced Materials. 2023.  p. 2210446. DOI : 10.1002/adma.202210446.

Conference Papers

2026

A 90.6 pJ/pixel 1280×800 65 fps cm-Scale Fully Integrated Video Encoder System Utilizing a 2×2 Microlens Array

H. Yang; P. Abillama; X. Wei; M. A. A. Huluvallay; Q. Zhang et al. 

2026. 2026 IEEE/JSAP Symposium on VLSI Technology and Circuits (VLSI Technology and Circuits), Honolulu, HI, USA, 2026-06-14 – 2026-06-18. p. 1 – 3. DOI : 10.1109/vlsitechnologyandcir65830.2026.11577285.

Tailoring glass properties and microstructure with sub-100 femtosecond pulses

L. Ackermann; Y. Bellouard 

2026. Lasers and Photonics for Advanced Manufacturing II, Strasbourg, France, 2026-04-12 – 2026-04-17. DOI : 10.1117/12.3099941.

Manufacturing of 3D glass micro-optics through laser assisted topological transformation

M. Lentz; Y. Bellouard 

2026. Lasers and Photonics for Advanced Manufacturing II, Strasbourg, France, 2026-04-12 – 2026-04-17. DOI : 10.1117/12.3100228.

Femtosecond laser processing of an integrated fiber Fabry-Perot cavity device in glass

A. Duret; Y. Bellouard; J. Reichel; R. Long 

2026. Lasers and Photonics for Advanced Manufacturing II, Strasbourg, France, 2026-04-12 – 2026-04-17. DOI : 10.1117/12.3099747.

Three decades of innovation in femtosecond laser functionalization of glass substrates: from pioneer works reaching industrial maturity to challenges and opportunities

Y. Bellouard 

2026. Lasers and Photonics for Advanced Manufacturing II, Strasbourg, France, 2026-04-12 – 2026-04-17. DOI : 10.1117/12.3117064.

2025

On the Use of UV Femtosecond Pulses to Write Waveguides in Fused Silica

L. Ackermann; Y. Bellouard 

2025. 2025 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Munich, Germany, 2025-06-23 – 2025-06-27. DOI : 10.1109/cleo/europe-eqec65582.2025.11109929.

Self-organised UV Femtosecond Laser Induced Modifications in the Bulk of Fused Silica

E. Gribaudo; Y. Bellouard 

2025. 2025 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference, Munich, Germany, 2025-06-23 – 2025-06-27. DOI : 10.1109/cleo/europe-eqec65582.2025.11109422.

Dynamic Observations of Femtosecond Laser Machining in Borosilicate Using a QCL

M. Singleton; S. Lee; C. Cheayto; M. Bertrand; M. Beck et al. 

2025. Conference on Lasers and Electro-Optics 2025, Long Beach, CA, US, 2025-05-04 – 2025-05-09. DOI : 10.1364/CLEO_AT.2025.AA100_4.

2024

Survival of nanogratings in high melting oxide glasses upon thermal annealing

I. Ktafi; Q. Xie; G. Torun; Y. Bellouard; M. Yembele et al. 

2024. Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides, Quebec City, Canada, 2024-07-28 – 2024-08-01.

Holographic Illumination for Fast Wide-Field Third-Harmonic Generation Imaging

O. Bernard; V. Stergiopoulou; S. Hasegawa; H. Yoshio; J. Squier et al. 

2024. Imaging Systems and Applications 2024, Toulouse, France, 2024-07-15 – 2024-07-19. DOI : 10.1364/isa.2024.im3g.6.

Femtosecond Laser Based Nanostructuring in the Bulk of Fused Silica

E. Gribaudo; P. Vlugter; Y. Bellouard 

2024. Conference on Lasers and Electro-Optics, Charlotte, United States, 2024-05-07 – 2024-05-10. DOI : 10.1364/cleo_at.2024.am2c.2.

Ultrafast Laser Volume Nanostructuring of Transparent Materials: From Nanophotonics to Nanomechanics

Y. Bellouard 

2024. Bragg Gratings, Photosensitivity, and Poling in Glass Waveguides 2024, Québec City, Canada, 2024-07-28 – 2024-08-01. DOI : 10.1364/bgpp.2024.bm1a.1.

On the correlation between femtosecond laser-induced defects taxonomy and localized accelerated chemical etching in fused silica

V. Parmar; N. Ollier; Y. Bellouard 

2024. Conference on Lasers and Electro-Optics, Charlotte, United States, 2024-05-07 – 2024-05-10. DOI : 10.1364/cleo_at.2024.am3c.4.

Theses

2026

Self-regulating nanostructuring of transparent materials via femtosecond laser irradiation

E. Gribaudo / Y. Bellouard (Dir.)  

Lausanne, EPFL, 2026. 

2024

Laser-based manufacturing of freeform glass micro-optics through topological transformation

S. Y. Benketaf / Y. Bellouard (Dir.)  

Lausanne, EPFL, 2024. 

2023

On the interaction of femtosecond laser pulses with layered dielectric materials

R. Ricca / Y. Bellouard (Dir.)  

Lausanne, EPFL, 2023. 

Talks

2025

High-speed low-loss waveguide writing in fused silica using UV femtosecond laser pulses

L. Ackermann; B. Hermann; E. Gribaudo; D. T. Echarri; Y. Bellouard 

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXV, San Francisco, United States, 2025-01-25 – 2025-01-31.

An all glass, high finesse miniature integrated fiber Fabry-Perot microcavity produced by 3D femtosecond laser processing

A. Duret; J. Reichel; R. Long; Y. Bellouard 

Quantum Sensing, Imaging, and Precision Metrology III, San Francisco, United States, 2025-01-25 – 2025-01-31.

3D manufacturing of glass multifocal microlens-arrays and skewed optics through laser assisted processes

M. Lentz; S. Benketaf; Y. Bellouard 

Laser 3D Manufacturing XII, San Francisco, United States, 2025-01-25 – 2025-01-31.

Towards all-glass monolithic realization of arbitrary whispering gallery mode resonators

M. Deckart; M. Zerbib; S. Colombel; C. Lafforgue; J. Beugnot et al. 

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXV, San Francisco, United States, 2025-01-25 – 2025-01-31.

2024

Advances in single shot spatial frequency modulation imaging (SPIFI)

J. A. Squier; S. Cottrell; D. Scarbrough; A. Thomas; O. Bernard et al. 

Ultrafast Nonlinear Imaging and Spectroscopy XII, San Diego, United States, 2024-08-18 – 2024-08-23.

Leveraging computational imaging for enhanced third-harmonic generation microscopy

V. Stergiopoulou; O. Bernard; C. Stathaki; Y. Bellouard; M. Vetterli 

Ultrafast Nonlinear Imaging and Spectroscopy XII, San Diego, United States, 2024-08-18 – 2024-08-23.

Functional integration through femtosecond laser-induced nano-structuration of glass

Y. Bellouard 

Fiber Lasers and Glass Photonics: Materials through Applications IV, Strasbourg, France, 2024-04-07 – 2024-04-12.

Glass for photonics: insight in the glass properties obtained under laser fs writing via point defects analysis

O. Nadège; F. Alassani; Y. Petit; T. Cardinal; V. Parmar et al. 

Fiber Lasers and Glass Photonics: Materials through Applications IV, Strasbourg, France, 2024-04-07 – 2024-04-12.

Free-space monolithic reflow-based fused silica fiber-to-fiber couplers

D. T. Echarri; S. Benketaf; Y. Bellouard 

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, San Francisco, United States, 2024-01-27 – 2024-02-01.

Femtosecond laser-induced crystallization processes in amorphous Al2O3/Nb2O5 multilayers studied with operando X-ray micro-diffraction

L. Boie; B. Hermann; R. Ricca; S. Lee; D. F. Sánchez et al. 

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, San Francisco, United States, 2024-01-27 – 2024-02-01.

Spatial frequency modulated imaging with a single femtosecond pulse

O. Bernard; S. Cottrell; R. A. Bartels; Y. Bellouard; J. Squier 

Real-time Measurements, Rogue Phenomena, and Single-Shot Applications IX, San Francisco, United States, 2024-01-27 – 2024-02-01.

Wide-field third-harmonic imaging of femtosecond laser-induced in-volume modifications

C. Stathaki; O. Bernard; V. Stergiopoulou; M. Simeoni; M. Vetterli et al. 

Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XXIV, San Francisco, United States, 2024-01-27 – 2024-02-01.

Patents

2026

Optical-delay-line assembly

Y. BELLOUARD; A. DELGOFFE 

WO2026068682.

2026.

2024

Substrate comprising slots for holding optical components of a laser cavity

A. M. Delgoffe; Y. Bellouard; S. I. Nazir 

WO2024157052.

2024.

2023

Non-volatile data storage medium and system

R. Ricca; Y. Bellouard; M. Vetterli 

WO2023208571.

2023.