Explanipedia

Thin film LiNbO<sub>3</sub> surface preparation using SC-1 Open

Kumar Kinjalk, Clément Selva, Olivier Gauthier‐Lafaye, S. Calvez, Jérôme Esvan , et al. · 2025

This study investigates the use of Standard Cleaning 1 (SC-1), a routine treatment in silicon micro-/nano-fabrication, as a step in the processing of photonic structures and waveguides on thin films of lithium niobate on insulator (LNOI). …

Optical properties and photonic applications of molecular spin-crossover materials Open

Karl Ridier, Ayman Hoblos, S. Calvez, Maciej Lorenc, William Nicolazzi , et al. · 2025

Grayscale evaporation of organic thin-film microstructures Open

S. Calvez, David Bourrier, Justine Bonneau, Ludovic Salvagnac, Isabelle Séguy , et al. · 2025

We demonstrate that the deposition of organic thin films whose thickness is spatially shaped with sub-100-µm lateral resolution can be achieved by evaporation through a reusable flux-controlling micrometric-hole sieve that is separated fro…

Does Electronic Strong Light-Matter Coupling Affect the Ground-State Energy Landscape? An Experimental Study Using Spin-Crossover Molecules Open

Ayman Hoblos, S. Calvez, Lionel Salmon, Gábor Molnár, Karl Ridier , et al. · 2025

International audience

Near-infrared transparent conductive electrodes based on composite GaAs-metal deep sub-wavelength high contrast grating Open

Natan Monvoisin, Weronika Głowadzka, F. Carcenac, S. Calvez, Olivier Gauthier‐Lafaye , et al. · 2024

This paper demonstrates the fabrication of near-infrared transparent electrodes customized for specific light polarization. We achieve this by employing semiconductor deep subwavelength monolithic high-contrast gratings (MHCG) integrating …

CRIGFs: Spectral filters, but also modal filters and combiners Open

Antoine Rouxel, A. Monmayrant, Pascal Dubreuil, S. Calvez, Olivier Gauthier‐Lafaye · 2024

International audience

Extraordinary enhancement of Second harmonic generation in cavity-resonator integrated grating couplers Open

E. Popov, Anne-Laure Fehrembach, Elizabeth Hemsley, François Renaud, Antoine Monmayrant , et al. · 2024

International audience

Visible-light modulators and power limiters based on spin crossover material thin films Open

S. Calvez, Lijun Zhang, Jesukpego Anorld Capo Chichi, Yuteng Zhang, Lionel Salmon , et al. · 2024

International audience

Thermo‐Optical Switches Based on Spin‐Crossover Molecules with Wideband Transparency Open

Lijun Zhang, Jesukpego Anorld Capo Chichi, S. Calvez, Yuteng Zhang, Lionel Salmon , et al. · 2024

In this work, a thermally tunable optical resonator operating in the visible wavelength range is reported, which consists of a bilayer structure composed of a thin silver layer and a dielectric coating of [Fe(HB(1,2,4‐triazol‐1‐yl) 3 ) 2 ]…

Shadow-mask evaporation for the fabrication of optical filters with spatially tailored thickness Open

S. Calvez, Justine Bonneau, David Bourrier, Ludovic Salvagnac, Pascal Dubreuil , et al. · 2024

International audience

Selective excitation of high-order modes in two-dimensional cavity resonator integrated grating filters Open

Antoine Rouxel, Olivier Gauthier‐Lafaye, Antoine Monmayrant, S. Calvez · 2024

The selective spatial mode excitation of a bi-dimensional grating-coupled micro-cavity called a cavity resonator integrated grating filter (CRIGF) is reported using an incident beam shaped to reproduce the theoretical emission profiles of …

Selective modal excitation of a nanophotonic cavity with a programmable phase mask Open

Antoine Rouxel, Antoine Monmayrant, S. Calvez, Olivier Gauthier‐Lafaye · 2024

Selective spatial mode excitation of a grating-coupled multimode micro-cavity is achieved using an incident beam shaped with a programmable phase mask. Real-time control of the phase mask coupled to differential evolution algorithm allows …

Computational inspection of VCSEL oxidation exploiting a spectrally-shaped illuminator Open

Antoine Rouxel, Antoine Monmayrant, S. Calvez, Guilhem Almuneau · 2024

We introduce a co-design approach for VCSEL fabrication monitoring using sinusoidal illumination, well-suited for multi-layer inspection tasks. This methodology not only broadens the range of monitoring tasks but also aims to enhance preci…

Reversible Switching of Strong Light–Matter Coupling Using Spin-Crossover Molecular Materials Open

Lijun Zhang, Karl Ridier, Oleksandr Ye. Horniichuk, S. Calvez, Lionel Salmon , et al. · 2023

The formation of hybrid light-matter states through the resonant interaction of confined electromagnetic fields with matter excitations has emerged as a fascinating tool for controlling quantum-mechanical states and then manipulating the f…

Critical coupling in cavity-resonant integrated-grating filters (CRIGFs) Open

Elizabeth Hemsley, Olivier Gauthier‐Lafaye, Antoine Monmayrant, Pascal Dubreuil, S. Calvez , et al. · 2023

We experimentally demonstrate critical coupling in miniature grating-coupled resonators known as cavity-resonant integrated-grating filters (CRIGFs). Using previously proposed asymmetric grating coupler designs for non-linear CRIGFs, and i…

Caractérisation à 10 Gbit/s d'un modulateur à électro-absorption à cavité verticale à 850 nm Open

Laurent Bramerie, M. Gay, Lucas Laplanche, Ludovic Marigo- Lombart, Christophe Viallon , et al. · 2023

National audience

Nonlinear Conversion in Cavity-Resonator Integrated Grating Filters Open

S. Calvez, François Renaud, Elizabeth Hemsley, Antoine Monmayrant, Olivier Gauthier‐Lafaye , et al. · 2023

International audience

Spectrally-shaped illumination for improved optical inspection of lateral III-V-semiconductor oxidation Open

Natan Monvoisin, Elizabeth Hemsley, Lucas Laplanche, Guilhem Almuneau, S. Calvez , et al. · 2023

We report an hyperspectral imaging microscopy system based on a spectrally-shaped illumination and its use to offer an enhanced in-situ inspection of a technological process that is critical in Vertical-Cavity Surface-Emitting Laser (VCSEL…

Critical coupling in Cavity Resonator Integrated Grating Filters (CRIGFs) for SHG control Open

Olivier Gauthier‐Lafaye, S. Calvez, Antoine Monmayrant, Elizabeth Hemsley, Anne-Laure Fehrembach , et al. · 2023

We demonstrate experimentally critical coupling for nonlinear conversion in grating-coupled Fabry-Pérot planar microcavities known as Cavity-Resonant Integrated Grating Filters (CRIGFs). Novel asymmetric designs offer Q-factors from 1000 t…

Controlling the strong light-matter coupling in metal-dielectric optical resonators using spin-crossover molecules Open

Karl Ridier, Lijun Zhang, S. Calvez, Lionel Salmon, Gábor Molnár , et al. · 2023

We report the observation of (ultra)strong light-matter coupling, in the UV spectral region, between optical modes of a metal/dielectric bilayer nanocavity and the electronic excitations of spin-crossover (SCO) molecules. By thermally swit…

Design and optimization of a blue fluorescent microcavity-organic light-emitting diode (MOLED) on AZO anode for an algae excitation light source application Open

L.A. Lozano-Hernández, Jean‐Baptiste Doucet, Benjamin Reig, Ludovic Salvagnac, Hyoyoung Lee , et al. · 2023

Si_Z O_X N_Y BY INDUCTIVE-COUPLED-PLASMA PLASMA-ENHANCED CHEMICAL VAPOR DEPOSITION FOR MULTI-LAYER OPTICAL THIN FILMS Open

S. Calvez, Pascal Dubreuil, Mairame Diallo, E. Daran, Antoine Monmayrant , et al. · 2022

Broadband high-contrast visible optical switches based on a spin-crossover material Open

S. Calvez, Henri Camon, Karl Ridier, Gábor Molnár, Olivier Gauthier‐Lafaye · 2022

Visible optical switches embedding a spin-crossover thin film and exploiting the frustrated total internal reflection operation principle are studied and optimized numerically with a view to obtain broadband high-contrast devices. A practi…

Cavity-resonator integrated bi-atom grating coupler for enhanced second-harmonic generation Open

Anne-Laure Fehrembach, Evgueni Popov, Elizabeth Hemsley, Antoine Monmayrant, Olivier Gauthier‐Lafaye , et al. · 2022

We report on the design of cavity-resonator integrated grating couplers for second-harmonic generation. The key point is that the base pattern of our grating coupler (GC) is made of two ridges with different widths (bi-atom). Thus, we reac…

Extreme enhancement of the quality (Q)-factor and mode field intensity in cavity-resonator gratings Open

Evgeny Popov, Elizabeth Hemsley, Anne-Laure Fehrembach, Olivier Gauthier‐Lafaye, Antoine Monmayrant , et al. · 2022

In this paper, dielectric Cavity-Resonant Integrated-Grating Filters (CRIGFs) are numerically optimized to achieve extremely high-quality factors, by optimizing the cavity in/out-coupling rate and by introducing apodizing mode-matching sec…

Cavity resonator-integrated guided-mode resonance filters with on-chip electro- and thermo-optic tuning Open

Antoine Monmayrant, S. Calvez, Pierre-François Calmon, Pascal Dubreuil, Samuel Charlot , et al. · 2022

Cavity resonator grating filters (CRIGFs) integrated on lithium niobate on insulator (LNOI) with electrical tuning elements are reported. The resonance wavelength of the filters is in the 780 nm range. Integrated thermo-optical tuning rang…

Design of hybrid MoS<sub>2</sub>/photonic devices compatible with technological constraints Open

Jean‐Baptiste Dory, Olivier Gauthier‐Lafaye, Pascal Dubreuil, Inès Massiot, S. Calvez , et al. · 2022

The integration of transition metal dichalcogenide layers into photonic devices is a current challenge in the field of 2D materials. Based on numerical simulations, this work explores the design of devices combining an MoS 2 monolayer with…

Selective wet oxidation of AlAsSb alloys on GaAs Open

S. Calvez, Oleksandr Stepanenko, Kévin Louarn, E. Daran, Alexandre Arnoult , et al. · 2021

In this paper, the oxidation of thin low-Sb-containing AlAsSb layers quasi-lattice matched on GaAs substrates is studied in detail since, compared to AlGaAs, these alloys had the prospects of being laterally oxidized at a faster rate, at l…

Dark mode-in-the-box for enhanced second-harmonic generation in corrugated waveguides Open

Anne-Laure Fehrembach, François Renaud, Evgeny Popov, Hervé Tortel, Antoine Monmayrant , et al. · 2021

A numerical study of second-harmonic generation (SHG) in cavity resonator integrated grating filters (CRIGFs) shows extraordinary strong conversion rates in planar corrugated waveguides based on lithium niobate layers, not exceeding 625 µm…

Engineering the anisotropy of AlAs wet oxidation using silicon implantation Open

S. Calvez, Alexandre Arnoult, Guilhem Almuneau · 2021

We investigate the influence of silicon implantation on wet lateral oxidation of AlAs and show that the introduction of n-type doping silicon ions permits the adjustment of the oxidation kinetics and anisotropy. Using mesas with selectivel…

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