References of "Lenaerts, Cedric"
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See detailDesign optimization of large-size format edge-lit light guide units
Hastanin, Juriy ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the ... [more ▼]

In this paper, we present an original method of dot-pattern generation dedicated to design optimization of large-size format ELBUs (Edge-Lit Light Guide Unit), where the number of dots greatly exceeds the maximum allowable number of optical objects supported by most common ray-tracing software. In the proposed method, in order to simplify the computational problem, an original optical system is replaced by an equivalent one. Accordingly, the original dot pattern is splitted into multiple small sections. Then, these sections are replaced by equivalent cells with continuous diffusing film. After that, we adjust the TIS (Total Integrated Scatter) two-dimensional distribution over the grid of equivalent cells, using an iterative optimization procedure. Finally, the obtained optimal TIS distribution is converted into the dot size distribution by applying an appropriate conversion rule. An original semi-empirical equation dedicated to rectangular large-size LGPs (Light Guide Plate) is proposed for the initial guess of the TIS distribution. It allows significantly reducing the time needed to dot pattern optimization. [less ▲]

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See detailCompact handheld low-cost biosensor platform for remote health monitoring
Hastanin, Juriy ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg et al

in Proceedings of SPIE; SPIE 2016 Photonics Europe (2016, April)

In this paper, we present an original concept of plasmonic-related instrumentation platform dedicated to diagnostic biosensing tests out of the laboratory. The developed instrumental platform includes ... [more ▼]

In this paper, we present an original concept of plasmonic-related instrumentation platform dedicated to diagnostic biosensing tests out of the laboratory. The developed instrumental platform includes both disposable one-use microfluidic affinity biochip and compact optical readout device for biochip monitoring involving mobile Internet devices for data processing and communication. The biochip includes both microfluidic and optical coupling structures formed into a single plastic slab. The microfluidic path of the biochip operates in passive capillary pumping mode. In the proof-of-concept prototype, we address specifically the sensing format involving Surface Plasmon Resonance phenomenon. The biochip is plugged in the readout device without the use of an index matching fluid. An essential advantage of the developed biochip is that its implementation involves conventional hot embossing and thin film deposition process, perfectly suited for mass production of low-cost microfluidic biochip for biochemical applications. [less ▲]

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See detailMICROBIOMED: Planar optic chip manufacturing and read-out
Fleury-Frenette, Karl ULg; Hastanin, Juriy ULg; Lenaerts, Cedric ULg et al

Poster (2014, September 11)

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See detailNew Monolithic High Solar Rejection EUV Transmission Filter
Fleury-Frenette, Karl ULg; Renotte, Etienne ULg; Lenaerts, Cedric ULg et al

Conference (2014, August)

New Monolithic High Solar Rejection EUV Transmission Filter Fleury-Frenette, Karl; Renotte, Etienne; Lenaerts, C.; Rossi, Laurence; Jacques, Lionel; Halain, Jean-Philippe; Rochus, Pierre 40th COSPAR ... [more ▼]

New Monolithic High Solar Rejection EUV Transmission Filter Fleury-Frenette, Karl; Renotte, Etienne; Lenaerts, C.; Rossi, Laurence; Jacques, Lionel; Halain, Jean-Philippe; Rochus, Pierre 40th COSPAR Scientific Assembly. Held 2-10 August 2014, in Moscow, Russia, Abstract D2.3-22-14. A new high solar rejection transmission filter for the extreme UV has been developed for the Solar Orbiter Extreme Ultraviolet Imager (EUI). To provide enhanced resilience to high thermal load, a monolithic architecture approach has been taken in order to limit the thermal contact resistance between the filtering sub-micron thin film, its supporting mesh, and holding frame. Some aspects of the manufacturing process involving thin film deposition and photolithography will be presented along with optical performance and space environmental test results. New avenues for improving the thermo-optical properties of the filter will also be discussed. [less ▲]

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See detailSpectral splitting planar solar concentrator : Design and Experimental testing Preliminary results
Blain, Pascal ULg; Michel, Céline ULg; Clermont, Lionel ULg et al

in Proceedings of SPIE (2014, May 15), 9140

We present a new concept in solar concentrator: spectral splitting. It implies reflective, refractive and diffractive elements that allow two spectrally differentiated beams to reach different and/or ... [more ▼]

We present a new concept in solar concentrator: spectral splitting. It implies reflective, refractive and diffractive elements that allow two spectrally differentiated beams to reach different and/or unmatched lattice solar cells. Those cells efficiencies are then enhanced. The aimed geometrical concentration factor is 5× and the theoretical optical efficiency of that concentrator concept reaches 82%. [less ▲]

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See detailTransmitive spectral SPR droplet biosensing: principle, sensor design and experimental demonstration
Hastanin, Juriy ULg; Lenaerts, Cedric ULg; Fleury-Frenette, Karl ULg et al

in Plasmonics (2013)

Surface Plasmons Resonance (SPR) architectures based on grating coupler/disperser combination is an attractive alternative for spectral-based biochemical sensing. In this paper, we investigate ... [more ▼]

Surface Plasmons Resonance (SPR) architectures based on grating coupler/disperser combination is an attractive alternative for spectral-based biochemical sensing. In this paper, we investigate theoretically and experimentally a new concept where the plasmon coupling occurs through a thin film grating and sensing occurs via the first evanescent diffraction order in transmitive mode. The surface plasmon wave excitation induces a peak in the wavelength as well as in the angular spectra of the detected first transmitted diffraction order. Accordingly, a change in SPR spectrum of the detected diffraction order can be used to quantify the amount of the target molecules immobilized on the sensor surface and therefore, the concentration of these molecules in the analyte solution. The developed sensor architecture is dedicated to droplet biochemical sensing and appears to be especially suitable for biosensor integration and miniaturization. The presented sensor concept is perfectly suited for mass production of low-cost and reproducible SPR sensor chip for biochemical analysis. The implemented setup gives access to multichannel biosensing with the potential for efficient internal referencing, essential to achieve sufficiently high reproducibility and accuracy of the measurements. [less ▲]

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See detailSubstrate Mode-Integrated SPR Sensor
Lenaerts, Cedric ULg; Vilcot, Jean-Pierre; Hastanin, Juriy ULg et al

in Plasmonics (2013), 8(2), 1203-1208

We present the design, implementation and characterisation of an integrated surface plasmon resonance (SPR) biosensor chip involving diffractive optical coupling elements avoiding the need of prism ... [more ▼]

We present the design, implementation and characterisation of an integrated surface plasmon resonance (SPR) biosensor chip involving diffractive optical coupling elements avoiding the need of prism coupling. The integrated sensor chip uses the angular interrogation principle and includes two diffraction gratings and the SPR sensing zone. The theoretical design is presented as well as the fabrication process. Experimental results (response of a reference water droplet and phosphate-buffered saline/water kinetic) are presented and compared with those obtained with the classical Kretschmann prism coupling setup. We believe that this prism-free architecture is perfectly suitable for low-cost and reproducible SPR biochemical sensor chips since the sensing zone can be functionalised as any other one [less ▲]

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See detailCompact integrated surface plasmon resonance spectroscopic sensor platform with on-chip self-referencing
Hastanin, Juriy ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg et al

in Proceeding of the International Conference on Surface Plasmon Photonics (SPP6): Ottawa, Canada, May 2013 (2013, May)

We present the SPR_CD spectroscopic biosensor design experimentally investigated by our research group. The implemented sensor platform is dedicated to droplet biochemical analysis involving multichannel ... [more ▼]

We present the SPR_CD spectroscopic biosensor design experimentally investigated by our research group. The implemented sensor platform is dedicated to droplet biochemical analysis involving multichannel detection format. [less ▲]

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See detailInnovative Surface Plasmon Resonance biosensing architectures
Desfours, Caroline; Piron, Pierre ULg; Habraken, Serge ULg et al

Conference (2012, December 11)

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological ... [more ▼]

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological molecules with a two-wavelength sensor and a SPR Coupler-Disperser spectroscopic sensor. [less ▲]

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See detailInnovative Surface Plasmon Resonance biosensing architectures
desfours, Caroline; Hastanin, Juriy ULg; Drucbert, Anne-Sophie et al

in International Conference on Fibre Optics and Photonics (2012, December)

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological ... [more ▼]

Surface Plasmons Resonance (SPR) architectures involving multi-wavelength interrogation are an attractive alternative for droplet biosensing. We present our results for in situ measurements of biological molecules with a two-wavelength sensor and a SPR Coupler- Disperser spectroscopic sensor. [less ▲]

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See detailExperimental Results of Flat Fresnel Doublets made of PMMA and PC
Languy, Fabian ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg et al

Conference (2012, April)

To reduce the chromatic aberration lots of imaging systems like cameras and telescopes turn to achromatic doublets. On the other hand, to be cheaper, lighter and thinner, more and more systems like ... [more ▼]

To reduce the chromatic aberration lots of imaging systems like cameras and telescopes turn to achromatic doublets. On the other hand, to be cheaper, lighter and thinner, more and more systems like projectors and headlights use Fresnel lenses. To combine high performances and low cost, the use achromatic Fresnel doublets has been investigated. [less ▲]

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See detailExperimental Results of Hybrid and Refractive Achromatic Doublets Made of PC and PMMA
Languy, Fabian ULg; Lenaerts, Cedric ULg; Loicq, Jerôme ULg et al

Conference (2012)

To combine achromatic system with cost-effective technology, we propose the use or hybride (refractive/diffractive) and refractive doublets Fresnel lenses. These two technologies have been compared ... [more ▼]

To combine achromatic system with cost-effective technology, we propose the use or hybride (refractive/diffractive) and refractive doublets Fresnel lenses. These two technologies have been compared experimentally from an optical point of view [less ▲]

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See detailIntegrated prism-free coupled surface plasmon resonance biochemical sensor
Lenaerts, Cedric ULg; Hastanin, Juriy ULg; Pinchemel, Bernard et al

in Proceedings of SPIE (2012), 8424

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See detailExperimental investigation of droplet biosensing by multi-wavelength plasmonic
Desfours, Caroline ULg; Habraken, Serge ULg; Hastanin, Juriy ULg et al

in Proceedings of SPIE Vol. 8234 : Plasmonics in Biology and Medicine IX (2012)

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See detailFlat Fresnel doublets made of PMMA and PC: combining low cost production and very high concentration ratio for CPV
Languy, Fabian ULg; Fleury-Frenette, Karl ULg; Lenaerts, Cedric ULg et al

in Optics Express (2011), 19(S3), 280-294

The linear chromatic aberration (LCA) of several combinations of polycarbonates (PCs) and poly (methyl methacrylates) (PMMAs) as singlet, hybrid (refractive/diffractive) lenses and doublets operating with ... [more ▼]

The linear chromatic aberration (LCA) of several combinations of polycarbonates (PCs) and poly (methyl methacrylates) (PMMAs) as singlet, hybrid (refractive/diffractive) lenses and doublets operating with wavelengths between 380 and 1600 nm – corresponding to a typical zone of interest of concentrated photovoltaics (CPV) – are compared. Those comparisons show that the maximum theoretical concentration factor for singlets is limited to about 1000 × at normal incidence and that hybrid lenses and refractive doublets present a smaller LCA increasing the concentration factor up to 5000 × and 2 × 106 respectively. A new achromatization equation more useful than the Abbé equation is also presented. Finally we determined the ideal position of the focal point as a function of the LCA and the geometric concentration which maximizes the flux on the solar cell. [less ▲]

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See detailSurface plasmon resonance-based biosensors: From the development of different SPR structures to novel surface functionalization strategies
Wijaya, Edy; Lenaerts, Cedric ULg; Maricot, Sophie et al

in Current Opinion In Solid State Materials Science (2011), 15(5), 208-224

Surface plasmon resonance (SPR)-based biosensors are very powerful tools for the study of biomolecular interactions, chemical detection and immunoassays. This paper reviews the performance of various SPR ... [more ▼]

Surface plasmon resonance (SPR)-based biosensors are very powerful tools for the study of biomolecular interactions, chemical detection and immunoassays. This paper reviews the performance of various SPR structures and detection schemes focusing on propagating surface plasmons generated in planar structures. Some aspects of their surface functionalization, the key element which imparts biofunctionality to these structures and hence transforming them into biosensors, will also be discussed accordingly. The ultimate performance of SPR-based biosensors will thus be determined by both their inherent optical performance and suitable surface functionalization. (C) 2011 Elsevier Ltd. All rights reserved. [less ▲]

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See detailFirst manufactured diamond AGPM vector vortex for the L- and N-bands: metrology and expected performances
Delacroix, Christian ULg; Forsberg, Pontus; Karlsson, Mikael et al

Conference (2010, October 28)

The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) is an optical vectorial vortex coronagraph (or vector vortex) synthesized by a circular subwavelength grating, that is a grating with a period ... [more ▼]

The AGPM (Annular Groove Phase Mask, Mawet et al. 2005) is an optical vectorial vortex coronagraph (or vector vortex) synthesized by a circular subwavelength grating, that is a grating with a period smaller than λ/n (λ being the observed wavelength and n the refractive index of the grating substrate). Since it is a phase mask, it allows to reach a high contrast with a small working angle. Moreover, its subwavelength structure provides a good achromatization over wide spectral bands. Recently, we have manufactured and measured our first N-band prototypes that allowed us to validate the reproducibility of the microfabrication process. Here, we present newly produced mid-IR diamond AGPMs in the N-band (~10 µm), and in the most wanted L-band (~3.5 µm). We first give an extrapolation of the expected coronagraph performances. We then present the manufacturing and measurement results, using diamond-optimized microfabrication techniques such as nano-imprint lithography (NIL) and reactive ion etching (RIE). Finally, the subwavelength grating profile metrology combines surface metrology (scanning electron microscopy, atomic force microscopy, white light interferometry) with diffractometry on an optical polarimetric bench and cross correlation with theoretical simulations using rigorous coupled wave analysis (RCWA). [less ▲]

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