Pascal Kockaert
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View article: Four-wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation
Four-wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation Open
While the nonlinear Shrödinger equation (NLSE) and its solving via the split-step Fourier method are well established when studying the Kerr interactions in waveguides, it is typically not applied when modeling a nonlinear interaction in a…
View article: Four-Wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation
Four-Wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation Open
While the nonlinear Shrödinger equation (NLSE) and its solving via the split-step Fourier method are well established when studying the Kerr interactions in waveguides, it is typically not applied when modeling a nonlinear interaction in a…
View article: Four-Wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation
Four-Wave mixing simulation in weakly nonlinear Bragg gratings using the grating dispersion operator in the nonlinear Schrödinger equation Open
While the nonlinear Shrödinger equation (NLSE) and its solving via the split-step Fourier method are well established when studying the Kerr interactions in waveguides, it is typically not applied when modeling a nonlinear interaction in a…
View article: Accessing different higher-order modes with nonlinear modal energy transfer under simple, realistic tuning of initial conditions
Accessing different higher-order modes with nonlinear modal energy transfer under simple, realistic tuning of initial conditions Open
The initial conditions in multi-mode fibers pumped by ultrashort laser pulses strongly determine the following nonlinear optical interactions. In this work, we firstly compare the detailed spatial mode content of simple initial conditions,…
View article: Accessing different higher-order modes with nonlinear modal energy transfer under simple realistic tuning of initial conditions
Accessing different higher-order modes with nonlinear modal energy transfer under simple realistic tuning of initial conditions Open
The initial conditions in multi-mode fibers pumped by ultrashort laser pulses strongly determine the following nonlinear optical interactions. In this work we firstly compare the detailed spatial mode content of simple initial conditions, …
View article: Anisotropy and effective medium approach in the optical response of two-dimensional material heterostructures
Anisotropy and effective medium approach in the optical response of two-dimensional material heterostructures Open
Two-dimensional (2D) materials offer a large variety of optical properties, from transparency to plasmonic excitation. They can be structured and combined to form heterostructures that expand the realm of possibility to manipulate light in…
View article: Anisotropy and effective medium approach in the optical response of 2D material heterostructures
Anisotropy and effective medium approach in the optical response of 2D material heterostructures Open
2D materials offer a large variety of optical properties, from transparency to plasmonic excitation. They can be structured and combined to form heterostructures that expand the realm of possibility to manipulate light interactions at the …
View article: Modulated super-Gaussian laser pulse to populate a dark rovibrational state of acetylene
Modulated super-Gaussian laser pulse to populate a dark rovibrational state of acetylene Open
A pulse-shaping technique in the mid-infrared spectral range based on pulses with a super-Gaussian temporal profile is considered for laser control. We show a realistic and efficient path to the population of a dark rovibrational state in …
View article: Coupling to multi-mode waveguides with space-time shaped free-space pulses
Coupling to multi-mode waveguides with space-time shaped free-space pulses Open
Guided wave optics, including most prominently fiber optics and integrated photonics, very often considers only one or very few spatial modes of the waveguides. Despite being known and utilized for decades, multi-mode guided wave optics is…
View article: Optical modeling of single and multilayer two-dimensional materials and heterostructures
Optical modeling of single and multilayer two-dimensional materials and heterostructures Open
Bidimensional materials are ideally viewed as having no thickness, as their name suggests. Their optical response have been previously modelled by a purely bidimensional surface current or by a very thin film with some contradictory result…
View article: PULSE INDUCED DARK STATE OF ACETYLENE
PULSE INDUCED DARK STATE OF ACETYLENE Open
View article: Laser control of a dark vibrational state of acetylene in the gas phase—Fourier transform pulse shaping constraints and effects of decoherence
Laser control of a dark vibrational state of acetylene in the gas phase—Fourier transform pulse shaping constraints and effects of decoherence Open
We propose a methodology to tackle the laser control of a non-stationary dark ro-vibrational state of acetylene (C2H2), given realistic experimental limitations in the 7.7 μm (1300 cm−1) region. Simulations are performed using the Lindblad…
View article: Electrodynamics of two-dimensional materials: Role of anisotropy
Electrodynamics of two-dimensional materials: Role of anisotropy Open
The electromagnetic properties of 2D materials are modeled either as single\nsheets with a surface susceptibility or conductivity, or as thin films of\nfinite thickness with an effective permittivity. Their intrinsic anisotropy,\nhowever, …
View article: Solvent-induced self-assembly of uniform lying helix alignment of the cholesteric liquid crystal phase for the flexoelectro-optic effect
Solvent-induced self-assembly of uniform lying helix alignment of the cholesteric liquid crystal phase for the flexoelectro-optic effect Open
A uniform lying helix (ULH) alignment of cholesteric liquid crystals (LCs) is obtained using a solvent evaporation technique. The solvent evaporation method allows for the spontaneous formation of a virtually defect-free alignment, even in…
View article: Enhanced optical Kerr effect method for a detailed characterization of the third-order nonlinearity of two-dimensional materials applied to graphene
Enhanced optical Kerr effect method for a detailed characterization of the third-order nonlinearity of two-dimensional materials applied to graphene Open
Using an enhanced optically heterodyned optical Kerr effect method and a\ntheoretical description of the interactions between an optical beam, a single\nlayer of graphene, and its substrate, we provide experimental answers to\nquestions ra…
View article: Spatial fluctuations of optical solitons due to long-range correlated dielectric perturbations in liquid crystals
Spatial fluctuations of optical solitons due to long-range correlated dielectric perturbations in liquid crystals Open
Starting from the de Gennes theory of director fluctuations in nematics, we report on a model of the spatialfluctuations in nematicon propagation. We demonstrate that, when the long-range correlation that characterizesnematic liquid crysta…
View article: Enhanced Optical Kerr Effect Method for a detailed characterization of the third order nonlinearity of Graphene on a given substrate
Enhanced Optical Kerr Effect Method for a detailed characterization of the third order nonlinearity of Graphene on a given substrate Open
View article: Measuring the nonlinear refractive index of graphene using the optical Kerr effect method
Measuring the nonlinear refractive index of graphene using the optical Kerr effect method Open
© 2016 Optical Society of America.By means of the ultrafast optical Kerr effect method coupled to optical heterodyne detection (OHD-OKE), we characterize the third-order nonlinear response of graphene and compare it to experimental values …
View article: Localized plateau beam resulting from strong nonlocal coupling in a cavity filled by metamaterials and liquid-crystal cells
Localized plateau beam resulting from strong nonlocal coupling in a cavity filled by metamaterials and liquid-crystal cells Open
We investigate the formation of a localized plateau beam in the transverse section of a nonlinear optical ring cavity filled with a metamaterial and a nonlocal medium such as a nematic liquid crystal. We show that, far from the modulationa…
View article: Impact of third-order dispersion on nonlinear bifurcations in optical resonators
Impact of third-order dispersion on nonlinear bifurcations in optical resonators Open