Claude Renaut

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Renaut

First Name

Claude

ORCID

0000-0003-4143-0480

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Publications 1 - 10 of 15

Image-based autofocusing system for nonlinear optical microscopy with broad spectral tuning
Saerens, Grégoire; Lang, Lukas; Renaut, Claude; et al. (2019)
Optics Express
We present an image-based autofocusing system applied in nonlinear microscopy and spectroscopy with a wide range of excitation wavelengths. The core of the developed autofocusing system consists of an adapted two-step procedure maximizing an image score with six different image scorings algorithms implemented to cover different types of focusing scenarios in automated regime for broad wavelength region. The developed approach is combined with an automated multi-axis alignment procedure. We demonstrate the key abilities of the autofocusing procedure on different types of structures: single nanoparticles, nanowires and complex 3D nanostructures. Based on these experiments, we determine the optimal autofocusing algorithms for different types of structures and applications.
Hybrid Gold-Perovskite Nanodimers for Enhancing Second-Harmonic Generation
Renaut, Claude; Hendricks, Nicholas R.; Timpu, Flavia; et al. (2017)
Anapoles in Free-Standing III–V Nanodisks Enhancing Second-Harmonic Generation
Timofeeva, Maria; Lang, Lukas; Timpu, Flavia; et al. (2018)
Nano Letters
Reshaping the Second-Order Polar Response of Hybrid Metal–Dielectric Nanodimers
Renaut, Claude; Lang, Lukas; Frizyuk, Kristina; et al. (2019)
Nano Letters
III-V nanowires as building blocks for nonlinear photonics
Saerens, Grégoire; Tang, Iek; Bloch, Esther; et al. (2020)
Engineering of the Second‐Harmonic Emission Directionality with III–V Semiconductor Rod Nanoantennas
Saerens, Grégoire; Tang, Iek; Petrov, Mihail I.; et al. (2020)
Laser & Photonics Reviews
The ability to engineer nonlinear optical emission from nanostructures is a key challenge to create efficient and compact components for integrated devices. This paper shows a method to control and manipulate the directionality of second‐harmonic generation emission by engineering geometry and position of rod nanoantennas. Single and dimer nanoantennas are fabricated by slicing III–V semiconductor nanowires with focused ion beam milling. The nonlinear optical response of nanoantennas is tailored by adjusting their length and position to achieve a targeted phase difference. The studied GaAs nanoantennas have a wurtzite structure that allows to achieve preferable directions for the second‐harmonic emission compared to a typical bulk zinc blende structure from top‐down fabricated nanostructures. Wurtzite nanoantennas provide a pure electric dipole response at the second‐harmonic wavelength, which together with pi‐phase control of emitted light is used for designing nonlinear emission patterns. The simulation results show how to redirect the second‐harmonic beam up to 30° and how to tailor the emission profile by adding elements. This method of second‐harmonic generation manipulation and phase array engineering can be applied to different types of nanowires and nanostructures. Nonlinear beam steering with structures from nanowires will foster the creation of compact optical components for integrated circuits.
Hybrid plasmonic - all-dielectric nanodimers forsecond-harmonic generation
Petrov, Mihail; Timpu, Flavia; Hendricks, Nicholas R.; et al. (2017)
NANOP 2017: Book of Abstracts
Lithium Niobate Nanocubes as Linear and Nonlinear Ultraviolet Mie Resonators
Timpu, Flavia; Sendra, Joan; Renaut, Claude; et al. (2019)
ACS Photonics
III-V nanoantennas fabricated from nanowires for enhanced nonlinear optical signal at Mie resonances
Timofeeva, Maria; Lang, Lukas; Renaut, Claude; et al. (2018)
Proceedings of SPIE ~ Nanophotonics VII
Metal-Dielectric Nanodimers with Hybridized Resonances Probed by Second-Harmonic Polarization
Renaut, Claude; Lang, Lukas; Frizyuk, Kristina; et al. (2019)
OSA Technical Digest ~ Conference on Lasers and Electro-Optics

Publications 1 - 10 of 15

Claude Renaut

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