Concept
Théorie de Kirchhoff
Publications associées (49)
Narrowband Optical Coupler Using Fano Interference in First Order Diffraction
Olivier Martin, Benjamin Gallinet, Giorgio Quaranta, Fabian Michael Lütolf
Light coupling in waveguides has been extensively investigated in a variety of contexts, from photonic integrated circuits to biosensing and near-eye displays for augmented reality. Here, narrowband diffraction is reported using a Fano interference effect ...
AMER CHEMICAL SOC2021Diffraction artefacts from twins and stacking faults, and the mirage of hexagonal, polytypes or other superstructures
Recently, a hexagonal phase has been reported in high carbon steels in several studies. Here, we show that the electron microscopy results used in these studies were erroneously interpreted. The extra-spots in the diffraction patterns and the odd contrasts ...
2020Light pattern generation with hybrid refractive microoptics under Gaussian beam illumination
The generation of wide-angle diffraction patterns can be done in different ways using either thin diffractive optical elements with small features sizes or arrays of microoptics with large optical paths that are thick diffractive optical elements. Our aim ...
OPTICAL SOC AMER2020Scalar analytical expressions for the field dependence of Zernike polynomials in asymmetric optical systems with circular symmetric surfaces
Toralf Scharf, Alessandro Grosso
In this paper we derive scalar analytical expressions describing the full field dependence of Zernike polynomials in optical systems without symmetries. We consider the general case of optical systems constituted by arbitrarily tilted and decentered circul ...
2020Simulation of microoptics under inhomogeneous illumination: Sinusoidal Phase Grating under Gaussian Beam Illumination
Far field pattern generation is investigated for thick sinusoidal phase grating under a Gaussian beam illumination to obtain a high field of view. We compare the Fraunhofer approximation with the High-NA propagator and demonstrate that the Fraunhofer appro ...
IEEE2019Design and Analysis of Binary Fan-out Gratings based on Step-Transition Perturbation Approach
Nowadays, diffractive optical elements are used for a variety of applications because of their high design flexibility, compact size, and mass productivity. At the same time, they require having high and complex optical functionalities such as a large numb ...
SPIE-INT SOC OPTICAL ENGINEERING2019On Simple Scattering and Diffraction Models using Point Cloud Maps for Channel Model or Coverage Predictions
Karol Jacek Kruzelecki, Jean-Frédéric Wagen
One of the several challenges for high capacity wireless communications is to find propagation models able to predict as easily and accurately as possible the propagation channel to assess the performance of wide-band wireless systems. An investigation of ...
IEEE2018Transparent dielectric elastomer actuator used as tunable optical grating
Herbert Shea, Samuel Rosset, Xiaobin Ji
In this work, a transparent dielectric elastomer actuator is integrated into a tunable transmission grating. A 13 micron-thick silicone membrane has been sandwiched between two 750 nanometer-thick transparent ionogel electrodes to fabricate a transparent d ...
2016Metallized Gratings Enable Color Effects and Floating Screen Films by First-Order Diffraction
Olivier Martin, Martin Stalder
A new concept for generating visual effects with metallized gratings is introduced. Shadow evaporation of aluminum onto dielectric gratings is shown to produce strongly asymmetric color effects. Zero-order effects are combined with +/- first-order transmis ...
Wiley-V C H Verlag Gmbh2015Metallized Gratings Enable Color Effects and Floating Screen Films by First-Order Diffraction
Olivier Martin, Fabian Michael Lütolf
A new concept for generating visual effects with metallized gratings is introduced. Shadow evaporation of aluminum onto dielectric gratings is shown to produce strongly asymmetric color effects. Zero-order effects are combined with +/- first-order transmis ...
2015