Academic literature on the topic 'Réflexion interne totale frustrée'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the lists of relevant articles, books, theses, conference reports, and other scholarly sources on the topic 'Réflexion interne totale frustrée.'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Journal articles on the topic "Réflexion interne totale frustrée":
Provino, Laurent, Achille Monteville, David Landais, Olivier Le Goffic, Adil Haboucha, Thiery Taunay, and David Mechin. "Les fibres microstructurées : 20 ans d’existence et un vaste éventail d’applications." Photoniques, no. 99 (November 2019): 40–44. http://dx.doi.org/10.1051/photon/20199940.
Bameme, Bienvenu Wane, and Ghislain-David Kasongo Lukoji. "La responsabilité pénale des mineurs en droit international et en droit congolais : Entre un pragmatisme justifié et un dogmatisme affirmé." FIAT JUSTISIA:Jurnal Ilmu Hukum 12, no. 3 (October 4, 2018): 243. http://dx.doi.org/10.25041/fiatjustisia.v12no3.1373.
Dissertations / Theses on the topic "Réflexion interne totale frustrée":
Alagao, Mary Angelie. "Characterization and optimization of the Evanescent Wave Coronagraph." Electronic Thesis or Diss., Saint-Etienne, 2023. http://www.theses.fr/2023STET0060.
Direct imaging of exoplanets remains challenging due to the high contrast and the small angular separation between the star and the planet. It requires suppressing the blinding glare from the star and ensuring that the planet's faint light is not buried deep in various noises. Successful detection depends on the technological readiness and maturity of techniques and algorithms employed while considering the significant trade-offs on raw contrast, inner working angle, and throughput. One of its key components is the use of coronagraphs – instruments with the sole purpose of blocking/reducing the light from the star. This work presents a new type of Lyot coronagraph, invented by Dr. Yves Rabbia, that relies on the frustrated total internal reflection (FTIR) principle to suppress the starlight. This coronagraph is aptly called the Evanescent Wave Coronagraph (EvWaCo) owing to its nature that its focal plane mask, comprising a lens and a prism, reflects the off-axis source (planet) and transmits the on-axis source (star) by capturing the evanescent waves. This thesis aims to provide the reader with the groundwork that highlights EvWaCo's three main advantages: i) the mask is inherently achromatic, ii) the size of the mask is adjustable by changing the pressure between the lens and the prism, and iii) both the stellar light and the planet light can be collected simultaneously for low-order wavefront sensing, and proper stellar light centering. The performance of EvWaCo is assessed through experiments in a laboratory and then compared to numerical simulations. The experimental results show a raw contrast equal to a few 10-4 at 3 ��/�� over the full I-band (��c = 800 nm, ∆��/�� ≈ 20%) and at 4 ��/�� over the full R-band (��c = 650 nm, ∆��/�� ≈ 23%). The simulations confirm the achromatic rejection capability of EvWaCo as it showed a raw contrast of 10-4 at the same radial distance over both bandpasses. This thesis concludes with the status of its testbed and future perspectives
Grognot, Marianne. "Imagerie térahertz par réflexion interne totale pour la biologie. : Application à l'étude de la perméabilisation cellulaire." Thesis, Université Paris-Saclay (ComUE), 2016. http://www.theses.fr/2016SACLX068/document.
Lying between 0.1 to 10x1012 Hz, the terahertz radiation occupies a middle ground between microwaves and infrared light waves, sometimes named “the terahertz gap” for technologies relevant to generation and detection have only risen at the beginning of the 90’s and aren’t fully developed yet. Nevertheless, there are strong exploratory incentives because of terahertz spectroscopic sensitivity to molecular states (rotational, vibrational…) and weak bounds in and between molecules. In the case of biological object, terahertz waves are especially sensitive to water: its quantity, physico-chemical state and solutes. We implemented an Attenuated Total internal Reflection (ATR) imaging setup in order to distinguish live cells from their physiological bathing medium. Throughout this work, we characterized both experimentally and experimentally the ATR setup. The first demonstration of the contrast origin in the terahertz images obtained was done. It arises from the intracellular content, more specifically the proteins and peptides dissolved in the cytoplasm.A precise analysis of the underlying mechanism of this proteinaceous terahertz contrast has also been developed. It gives access to original spectroscopic information about water, dissolved proteins and the hydration shell around them.Taking advantage of our whole setup comprehension, we proposed it as a non-invasive tool for quantitative live-cell permeabilization assessment in physiological conditions. During permeabilization, aka increased molecular transfers through the cell membrane, our tool allows to quantify the transfer of peptides and proteins. Live-cell permeabilization has a large application range, from fluorochrome entry in imaging, to drugs or gene therapy. In order to ensure molecules crossing the cell membrane, it’s necessary to alter its properties without compromising cell viability.A study of two permeabilization methods is proposed: chemical permeabilization and electroporation. In both cases dose effect mechanisms were quantitatively characterized. Our terahertz tool demonstrated great advantages over classical permeabilization quantification methods and permeabilization reversibility assessment methods
Wojdyla, Antoine. "Polarisation des impulsions térahertz et développement de l'imagerie par réflexion interne totale pour l'étude d'objets d'intérêt biologique." Phd thesis, Palaiseau, Ecole polytechnique, 2011. https://pastel.hal.science/docs/00/65/29/69/PDF/Manuscrit_A_Wojdyla.pdf.
The terahertz domain is a vast yet largely unexplored part of the electromagnetic spectrum, in spite of the virtues conferred by its intermediary situation between radar waves and infrared. Recent technological breakthroughs now allow to generate very short terahertz pulses and to proceed to a time-resolved detection of the associated electric field. The joint determination of phase and amplitude empowers to build new measurement schemes and opens us new possibilities in the processing of collected data. The phase plays a major role in the study on phenomena involving the polarization of electromagnetic waves, and assumes a peculiar meaning when dealing with ultra-sort pulses. The study of these particularities has motivated the design of achromatic polarizing elements fitted for the terahertz range using specific dielectric reflection conditions. These elements allow harnessing the differential phases and amplitudes between the two components of the electric field, so as to generate any kind of coherent polarization state. Associated with terahertz pulses are with submilllimeter wavelengths, which provide a decent spatial resolution when it comes to image objects, while information in the time domain can still be exploited. We carried out some imaging procedures with a view to pick the ones who were the better adapted to biological imaging. In order to take advantage of the sensitivity of the waves to ionic content of solutions and to cope with the high absorption of water in this frequency range, we developed a new imaging technique based on total internal reflection phenomenon. This technique gains its sensitivity from the measurement of the phase, while having an excellent transverse resolution which is well suited when it comes to study thin biological objects such as neurons or cell layers
Wojdyla, Antoine. "Polarisation des impulsions térahertz et développement de l'imagerie par réflexion interne totale pour l'étude d'objets d'intérêt biologique." Phd thesis, Ecole Polytechnique X, 2011. http://pastel.archives-ouvertes.fr/pastel-00652969.
Haïdar, Riad. "Nouveaux scenarii de quasi-accord de phase dans les semiconducteurs isotropes." Paris 11, 2003. http://www.theses.fr/2003PA112117.
Mid-infrared tunable sources are becoming of considerable interest for applications in environmental monitoring. Semiconductors of the technological mainstream (such as gallium arsenide or zinc selenide) are excellent candidates for optical conversion of near-infrared waves into the mid-infrared range. However, these materials are isotropic, so that quasiphase-matching scenarios are needed to get an efficient conversion. Reflection quasiphase-matching techniques are studied here. We make use of the Fresnel birefringence at total internal reflection to reach the phase-matching conditions in a plane parallel plate. It is shown that this technique is very similar in its principle to the natural birefringence phase-matching : we thus call it Fresnel phase-matching. Two schematic situations are explored. First, a model of classical resonant quasi-phase matching scenario is presented; the agreement between theoretical predictions and experimental results is convincing. Second, the Fresnel birefringence allows a new non-resonant quasiphase-matching scenario: this appears to greatly alleviates the phase-matching conditions and provides a high tenability. The impact of restricting factors is also quantified. So, the Goos-Hänchen shift is similar, in terms of conversion yield, to the classical walk-off. This actually limits the dimensions of the plate. However, the most inhibiting parameter appears to be the surface roughness : indeed, this sole factor is enough to determine the conversion efficiency of the whole structure. Optical parametric oscillation threshold calculations based on the Brosnan and Byer formula are finally presented. Parametric fluorescence is measured in a Fresnel phase-matched plate. The first estimations of the oscillation threshold are promising
Gaufillet, Fabian. "Cristaux photoniques à gradient : dispositifs et applications." Thesis, Paris 11, 2014. http://www.theses.fr/2014PA112295.
Artificially structured materials that are photonic crystals are commonly used for their dispersive properties. Their dielectric constant varies periodically across the wavelength in two or three directions with a sufficiently high index contrast. The resulting dispersion relation ω = ω(k) of the periodic variation has the form of a band structure within which there are photonic bandgaps in which the propagation of the electromagnetic field is prohibited. Outside of these bands, i.e. in the photonic band, there are the dispersion properties of the photonic crystals.The aim of this thesis is to design, fabricate and characterize graded photonic crystal devices. These devices were designed to be applied in areas ranging from microwaves to optics. We designed devices from photonic crystals with dispersive properties which make them similar to linear, homogeneous and isotropic media (LHI). In the unit cell of the LHI photonic crystal, we applied a gradient to achieve 1D graded lenses. Important results regarding the design, manufacturing and experimental characterization of a flat lens GRIN operating in X-band microwaves are deferred. This lens focuses an incident plane wave and collimates the wave emitted by a point source located in its focal plane. If this lens is itself a demonstrator and validates the approach implemented for the design, its potential applications particularly concern antennas. We also carry several 2D graded lenses including Lüneburg and Half Maxwell Fisheye lenses; their applications to the antennas are important. We are also interested in making optical graded index lenses called "SELFOC®".In order to confirm the remarkable dispersive properties that have been identified, we continued in that direction by revisiting a classic experiment that highlights the existence of evanescent waves: the "double right angle prism". We also highlight the phenomenon of "frustrated total internal reflection" and the shift discovered by Goos and Hänchen suffered by the reflected wave on the interface. It's these two points – frustrated total internal reflection and Goos-Hänchen effect - that we check in the case of LHI photonic crystals