Publications by Pieter Vlugter

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

Laser-inscribing arbitrary patterns with a sub-wavelength resolution in the bulk of transparent materials is of great importance for enabling reliable and versatile nano-manufacturing. Here, we propose a seeding-writing near-field enhancement based method ...

Optica Publishing Group2025

Femtosecond Laser Based Nanostructuring in the Bulk of Fused Silica

Yves Bellouard, Pieter Vlugter

We develop a femtosecond laser based fabrication technique which exploits near-field enhancement to generate selectively etchable arbitrarily long nanoplanes in the bulk of fused silica. The nanoplanes volumetric morphology and formation mechanism are inve ...

Institute of Electrical and Electronics Engineers Inc.2024

Abnormal temperature dependent elastic properties of fused silica irradiated by ultrafast lasers

Yves Bellouard, Pieter Vlugter

Materials with thermal-invariant elastic properties are of interest for resonant device frequency and dimensional stability of precision devices. Here, we demonstrate that the temperature coefficient of elasticity (TCE) of amorphous silica can be locally r ...

2022

Femtosecond laser-shockwave induced densification in fused silica

Yves Bellouard, Pieter Vlugter, Arunkrishnan Radhakrishnan, Julien Gilles Edgar Gateau

A tightly focused femtosecond laser-beam in the non-ablative regime can induce a shockwave sufficiently intense to reach local pressures in the giga-Pascal range or more. In a single beam configuration, the location of the highest-pressure zone is nested w ...

2022

Vibration monitoring based on optical sensing of mechanical nonlinearities in glass suspended waveguides

Yves Bellouard, Tao Yang, Pieter Vlugter, Enrico Casamenti

Vibration monitoring plays a key role in numerous applications, including machinerypredictive maintenance, shock detection, space applications, packaging-integrity monitoring andmining. Here, we investigate mechanical nonlinearities inherently present in s ...

2021

ABH damping of monolithic silica glass cantilever by structural and material modification using fs laser micromachining

Yves Bellouard, Pieter Vlugter, Kana Tomita

2020

Elastic properties of self-organized nanogratings produced by femtosecond laser exposure of fused silica

Yves Bellouard, Pieter Vlugter

Under certain exposure conditions, a femtosecond laser beam focused in the bulk of fused silica leads to the formation of self-organized structures consisting of a series of “nanolayers,” parallel to one another. Remarkably, this laser-induced nanoscale an ...

2020

Investigation of femtosecond laser-tuned thermomechanical properties of fused silica

Pieter Vlugter

The thermomechanical properties of materials are among the most important properties for designing precision instruments, in particular for devices seeking high-dimensional stability, invariant temperature-elastic properties or low thermoelastic losses. De ...

EPFL2020

Local tuning of fused silica thermal expansion coefficient using femtosecond laser

Yves Bellouard, Pieter Vlugter, Erica Kathleen Block

Femtosecond laser exposure of fused silica in the nonablative regime can lead to various localized bulk modifications of the material structure. In this paper, we show that these laser-induced modifications can be used to tune silica thermal expansion prop ...

2019