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Littérature scientifique sur le sujet « NONLINEAR CRYSTAL »

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Publié le 10 mars 2023

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Articles de revues sur le sujet "NONLINEAR CRYSTAL"

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Mao, Ningbin, Yutao Tang, Mingke Jin, Guanqing Zhang, Yang Li, Xuecai Zhang, Zixian Hu et al. « Nonlinear wavefront engineering with metasurface decorated quartz crystal ». Nanophotonics 11, no 4 (2 novembre 2021) : 797–803. http://dx.doi.org/10.1515/nanoph-2021-0464.

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Abstract In linear optical processes, compact and effective wavefront shaping techniques have been developed with the artificially engineered materials and devices in the past decades. Recently, wavefront shaping of light at newly generated frequencies was also demonstrated using nonlinear photonic crystals and metasurfaces. However, the nonlinear wave-shaping devices with both high nonlinear optical efficiency and high wave shaping efficiency are difficult to realize. To circumvent this constraint, we propose the idea of metasurface decorated optical crystal to take the best aspects of both traditional nonlinear crystals and photonic metasurfaces. In the proof-of-concept experiment, we show that a silicon nitride metasurface decorated quartz crystal can be used for the wavefront shaping of the second harmonic waves generated in quartz. With this crystal-metasurface hybrid platform, the nonlinear vortex beam generation and nonlinear holography were successfully demonstrated. The proposed methodology may have important applications in nonlinear structured light generation, super-resolution imaging, and optical information processing, etc.
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KIRUBAVATHI, K., K. SELVARAJU, N. VIJAYAN et S. KUMARARAMAN. « GROWTH AND CHARACTERIZATION OF GLYCINE HYDROBROMIDE SINGLE CRYSTAL FOR NONLINEAR OPTICAL APPLICATIONS ». Modern Physics Letters B 22, no 21 (20 août 2008) : 2035–42. http://dx.doi.org/10.1142/s0217984908016716.

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Single crystals of a new semi-organic nonlinear optical material glycine hydrobromide were grown from solution by slow evaporation at room temperature. Good optical quality single crystals with dimensions 17×8×5 mm3 were obtained. The grown crystal had been confirmed by single-crystal X-ray diffraction and the vibrational frequencies of various functional groups in the crystals had been derived from Fourier transform infrared spectrum. The optical quality of the grown crystals was analyzed by the Ultraviolet visible spectrum method. The mechanical behavior of the grown crystal was evaluated by Vickers' micro-hardness indentation method. The nonlinear optical property of the crystal was confirmed by the Kurtz powder technique using Nd : YAG laser as a source.
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Anis, Mohd, S. S. Hussaini, M. D. Shirsat et G. G. Muley. « Investigation on nonlinear optical and dielectric properties of L-arginine doped ZTC crystal to explore photonic device applications ». Materials Science-Poland 34, no 3 (1 septembre 2016) : 548–54. http://dx.doi.org/10.1515/msp-2016-0070.

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AbstractThe present study is focused to explore the photonic device applications of L-arginine doped ZTC (LA-ZTC) crystals using nonlinear optical (NLO) and dielectric studies. The LA-ZTC crystals have been grown by slow evaporation solution technique. The chemical composition and surface of LA-ZTC crystal have been analyzed by means of energy dispersive spectroscopy (EDS) and surface scanning electron microscopy (SEM) techniques. The Vicker’s microhardness study has been carried out to determine the hardness, work hardening index, yield strength and elastic stiffness of LA-ZTC crystal. The enhanced SHG efficiency of LA-ZTC crystal has been ascertained using the Kurtz-Perry powder SHG test. The closed-and-open aperture Z-scan technique has been employed to confirm the third order nonlinear optical nature of LA-ZTC crystal. The Z-scan transmittance data has been utilized to calculate the superior cubic susceptibility, nonlinear refractive index, nonlinear absorption coefficient and figure of merit of LA-ZTC crystal. The behavior of dielectric constant and dielectric loss of LA-ZTC crystal at different temperatures has been investigated using the dielectric analysis.
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Kulkarni, R. B., M. Anis, S. S. Hussaini et M. D. Shirsat. « Tuning optical properties of cadmium thiourea acetate nonlinear optical crystal exploiting organic ligand of L-proline ». Modern Physics Letters B 33, no 01 (10 janvier 2019) : 1850424. http://dx.doi.org/10.1142/s0217984918504249.

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Modifying optical properties of crystal is very fundamental need for designing various photonic devices, hence in the current investigation, the L-proline (LP) has been firstly doped in cadmium thiourea acetate (CTA) crystal with the aim to optimize the UV–Visible, second harmonic generation (SHG) efficiency, luminescence and third-order nonlinear optical (TONLO) properties of CTA crystal. The pure and doped CTA crystals have been grown by slow solvent evaporation technique at [Formula: see text]C. The structural parameters of grown crystals have been determined using the single crystal X-ray diffraction technique. The incorporation of LP in CTA crystal matrix has been confirmed by Fourier transforms infrared analysis. The UV–Visible studies have been employed within the wavelength range of 200–900 nm to explore the enhancing impact of LP on CTA crystal. The LP doped CTA crystals were subjected to Kurtz–Perry test and Z-scan analysis to identify the nonlinear nature of studied crystals. The SHG efficiency of LP-CTA crystal shows significant increase owing to enhanced charge transfer over the organic ligand of LP. The laser-induced TONLO properties of LP-doped CTA crystal have been determined at 632.8 nm. The nature of nonlinear refraction and absorption has been explored by close and open aperture Z-scan configuration. The magnitude of nonlinear refraction [Formula: see text], absorption coefficient [Formula: see text], cubic susceptibility [Formula: see text] and figure of merit has been determined using the transmittance data. The color-centered luminescence studies have been carried out which established the prominent redshift in peak maxima of emission wavelength of CTA crystal due to doping of LP. Comparative analysis of pure and doped crystal confirmed the dominance of LP doping.
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UPADHYAY, P. K., et A. K. NAGAR. « SOLITON PULSE ANALYSIS IN GaInP PHOTONIC CRYSTAL WAVEGUIDE ». International Journal of Modern Physics : Conference Series 22 (janvier 2013) : 675–78. http://dx.doi.org/10.1142/s2010194513010842.

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Solitons are nonlinear waves that remain invariant as they propagate. Precise control of dispersion and nonlinear effects govern soliton propagation. In recent years Photonic crystals (PhCs) have attracted a great deal of attention due to the facility to engineer and enhance both their nonlinear and dispersive effects. In this article we show soliton pulse analysis in GaInP Photonic Crystal Waveguides using AUTO bifurcation analysis tool. We have demonstrated pulse compression at moderately slow velocities in GaInP Photonic Crystal Waveguides. This is enabled by the enhanced self phase modulation and strong negative group velocity dispersion in the Photonic Crystal Waveguides.
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KIRUBAVATHI, K., K. SELVARAJU et S. KUMARARAMAN. « STUDIES ON GROWTH AND CHARACTERIZATION OF BIS THIOUREA LEAD CHLORIDE : A NOVEL NONLINEAR OPTICAL CRYSTAL ». Journal of Nonlinear Optical Physics & ; Materials 18, no 01 (mars 2009) : 153–59. http://dx.doi.org/10.1142/s0218863509004531.

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Single crystals of the metal-organic nonlinear optical material bis thiourea lead chloride were grown from solution growth technique for the first time. The grown crystals were characterized by single crystal X-ray diffraction analysis to confirm the crystal structure. The presence of various functional groups and the coordination of metal ions to thiourea were confirmed by Fourier transform infrared analysis. UV-Vis. spectrum was recorded to study the optical transparency of the grown crystals. The second order nonlinear optical property of the grown crystal was examined by Kurtz powder technique and mechanical behavior was studied by Vickers micro hardness test.
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Dhanaraj, P. V., et N. P. Rajesh. « Investigations on Nonlinear Optical 2-Aminopyridine Derivative Single Crystals ». Advanced Materials Research 685 (avril 2013) : 211–15. http://dx.doi.org/10.4028/www.scientific.net/amr.685.211.

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Nonlinear optical materials 2-aminopyridinium trifluoroacetate and bis (2-aminopyridinium) sulfate, were synthesized and single crystals were grown from aqueous solution employing the technique of controlled evaporation. The solubility and metastable zone width were found. The crystal structure was analyzed to reveal the molecular arrangements and the formation of hydrogen bonds in the crystal. High-resolution X-ray diffraction rocking curve measurements were performed to analyze the structural perfection of the grown crystals. Functional groups were identified and thermal behaviour and stability were studied. Mechanical and dielectric properties of crystals were analyzed. Optical studies reveal that both crystals have good transparency window. The nonlinear optical parameters of crystals were derived.
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Rajeswari, A., et P. Murugakoothan. « Growth and Characterization of Non-Linear Optical Single Crystal Guanidinium triscadmium Sulphate Octahydrate ». Asian Journal of Chemistry 31, no 3 (2019) : 661–68. http://dx.doi.org/10.14233/ajchem.2019.21722.

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Semi-organic single crystals of guanidinium tris cadmium sulphate octahydrate (GuCdS) with nonlinear optical properties were successfully grown by slow solvent evaporation technique. The grown crystals were characterised by powder X -ray diffraction analysis to determine the unit cell parameters. The structure of the compound belongs to triclinic crystal system and space group is found to be P1. The grown crystals were subjected to FTIR spectroscopic analysis to confirm the presence of functional groups present in the compound. UV-vis-NIR spectral study suggested that the grown crystal is transparent in the entire visible region, the lower cut off wavelength is 200 nm and the band gap value is estimated to be 6.14 eV. Nonlinear refractive index (n2), absorption coefficient (β) and third order nonlinear susceptibility (χ(3)) were calculated using Z-scan technique. The thermal stability of grown crystal was investigated by thermogravimetric and differential thermogravimetric analyses. The dielectric behaviour of the grown crystal was analyzed as a function of frequency of the applied field. The mechanical properties of grown crystal were examined by Vickers′s micro hardness test. The laser damage threshold of the grown crystal was calculated to be 1.796 GW/cm2.
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Xia, Mingjun, Bo Xu, Lijuan Liu, Xiaoyang Wang, Rukang Li et Chuangtian Chen. « Thermo-physical properties of nonlinear optical crystal K3B6O10Br ». Journal of Applied Crystallography 49, no 2 (8 mars 2016) : 539–43. http://dx.doi.org/10.1107/s1600576716001126.

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The thermo-physical properties of the nonlinear optical (NLO) crystal K3B6O10Br (KBB) were experimentally investigated, including specific heat, thermal conductivity, coefficient of thermal expansion and refractive index. The specific heat of KBB is lower than that of LiB3O5 and higher than that of other borate NLO crystals, such as β-BaB2O4, CsLiB6O10 and CsB3O5, and KBB manifests a high damage threshold because of its lower temperature gradient during laser pulse irradiation. The thermal expansion coefficients were obtained as α x = 5.09 × 10−6 K−1 and α z = 2.39 × 10−5 K−1, showing weaker anisotropy than those of commonly used NLO crystals. The temperature-dependent Sellmeier dispersion equations of the refractive indices were also obtained, and the phase-matching angles for second harmonic generation (SHG) at temperatures of 313, 343, 373, 403 and 433 K which were calculated from these equations are in good agreement with the experimental values. All results are indicative of the KBB crystal as a novel promising NLO crystal for high power SHG.
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Sreenivasan, R. S., N. Kanagathara, G. Ezhamani, N. G. Renganathan et G. Anbalagan. « Effect of Metal Dopant on Ninhydrin—Organic Nonlinear Optical Single Crystals ». Journal of Spectroscopy 2013 (2013) : 1–5. http://dx.doi.org/10.1155/2013/386024.

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In the present work, metal (Cu2+)-substituted ninhydrin single crystals were grown by slow evaporation method. The grown crystals have been subjected to single crystal XRD, powder X-ray diffraction, FTIR, dielectric and SHG studies. Single crystal X-ray diffraction analysis reveals that the compound crystallizes in monoclinic system with noncentrosymmetric space group P21 with lattice parametersa=11.28 Å,b=5.98 Å,c=5.71 Å,α=90∘,β=98.57,γ=90∘, andV=381 (Å)3, which agrees very well with the reported value. The sharp and strong peaks in the powder X-ray diffraction pattern confirm the good crystallinity of the grown crystals. The presence of dopants marginally altered the lattice parameters without affecting the basic structure of the crystal. The UV-Vis transmittance spectrum shows that the crystal has a good optical transmittance in the entire visible region with lower cutoff wavelength 314 nm. The vibrational frequencies of various functional groups in the crystals have been derived from FT-IR analysis. Based on the shifts in the vibrations, the presence of copper in the lattice of the grown crystal is clearly established from the pure ninhydrin crystals. Both dielectric constant and dielectric loss decrease with the increase in frequency. The second harmonic generation efficiency was measured by employing powder Kurtz method.
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Thèses sur le sujet "NONLINEAR CRYSTAL"

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Griffiths, J. « Crystal engineering for nonlinear optics ». Thesis, University of Cambridge, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.599722.

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Chapter Two details the design, synthesis and characterisation of some compounds of general formula p-DC6F4A-p’. Donor and acceptor groups are discussed both in the context of maximising the molecular NLO response, and in the context of the promotion of polar chain formation through supramolecular synthons. Of the ten compounds presented in this chapter, nine are noncentrosymmetric. Preliminary NLO measurements show that these nine compounds exhibit an appreciable SHG response. Semi-empirical calculations were performed on these and related systems to determine molecular hyperpolarisabilities.  Similar calculations were also used to draw Molecular Electrostatic potential maps for these compounds in an attempt to rationalise the observed packing. Chapter Three discusses some compounds of general formula DC6F4C6F4A. The synthetic difficulties associated with the preparation of these perfluorinated biphenyl derivatives are highlighted, and semi-empirical calculations are used to identify some idealised systems. The syntheses and crystal structures of some methoxy substituted derivatives are reported. Chapters Four and Five discuss some compounds in which donor-acceptor substituted rings are linked by delocalised spacer groups. The synthesis and characterisation of some donor-acceptor substituted aromatic Schiff base compounds is presented in Chapter Four, along with some initial calculations and NLO measurements. Chapter Five describes the design, synthesis and characterisation of some thiazyl chain compounds. UV measurements and preliminary calculations on some of these systems are also presented.
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CLEMENTI, MARCO. « Nonlinear Optics in Photonic Crystal Cavities ». Doctoral thesis, Università degli studi di Pavia, 2020. http://hdl.handle.net/11571/1317094.

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Harnessing the properties of light for technological applications is perhaps the ultimate objective of photonics, whereas the generation, manipulation and detection of light in chip-based structures has an important impact both on industry and on fundamental research1. The integration to semiconductor-based nanostructures makes possible the application of the photonics paradigm to compact devices which on one hand enable the processing of information at high speed, and on the other hand allow to include, onto a single chip, complex experimental apparatuses, opening the way towards novel technological and physical applications. In this perspective, an effective light-matter interaction is primarily important, as this feature greatly enhances capability of integrated optical and opto-electronic devices, in terms of switching time, energy consumption and spectrum of applications. For these reasons, the development of structures capable to enhance the interaction of light and matter covers great interest in the field of integrated optics. In this thesis work, we investigate on the linear and nonlinear properties of photonic crystal (PhC) microresonators2, a specific type of integrated optical cavity which capabilities to confine the electromagnetic field both in time and space are particularly suited for enhanced photonic devices. In particular, this type of nanostructure benefits from an enhanced nonlinear response with respect to bulk or non-resonant nonlinear devices, and they are characterized by a minimal footprint, a crucial feature in view of integration, thanks to a Bragg-type physical confinement mechanism. Throughout the work, we focus on three specific topics. The first one consists in the design, fabrication and characterization of PhC cavities realized in silicon suspended membranes, designed for the demonstration of integrated optical frequency combs. These rely on a specific cavity design, engineered to provide equally spaced resonances in energy, as a consequence of the effective confinement potential3. We discuss experimental results showing comb-like resonant spectra and we investigate the possibility to use the structures for the implementation of triply-resonant nonlinear processes, such as four-wave mixing (FWM), with unprecedented conversion efficiency. In a second part, we investigate on the suitability of a novel material, silicon-rich silicon nitride (SRSN)4, for the fabrication of PhC cavities and their operation as nonlinear devices. We show how SRSN deposited films can be successfully used to fabricate high-quality factor PhC cavities and we experimentally study the generation of second- and third-harmonic under resonant pumping regime. Finally, we investigate the suitability of otherwise parasitic nonlinear effects, related to two-photon absorption in silicon microcavities, for the implementation of nonlinear properties based on the dynamical thermo-optic response of the material. We show that the PhC platform provides a way to achieve narrow spectral holes and gain windows, associated to a pronounced dispersion. This feature, associated to a dramatic decrease in group velocity, can be exploited to achieve slow-light on a chip exclusively via thermo-optic effect, in a completely novel approach. 1. Thomson, D. et al. Roadmap on silicon photonics. J. Opt. 18, 073003 (2016). 2. Notomi, M. Manipulating light with strongly modulated photonic crystals. Reports Prog. Phys. 73, 096501 (2010). 3. Alpeggiani, F., Andreani, L. C. & Gerace, D. Effective bichromatic potential for ultra-high Q-factor photonic crystal slab cavities. Appl. Phys. Lett. 107, 261110 (2015). 4. Clementi, M. et al. Cavity-enhanced harmonic generation in silicon rich nitride photonic crystal microresonators. Appl. Phys. Lett. 114, 131103 (2019).
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Merlin, Jessica M. « SURFACE MEDIATED NONLINEAR OPTIC EFFECTS IN LIQUID CRYSTALS ». Case Western Reserve University School of Graduate Studies / OhioLINK, 2007. http://rave.ohiolink.edu/etdc/view?acc_num=case1169755107.

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Erbschloe, D. R. « Nonlinear effects in photorefractive crystals ». Thesis, University of Oxford, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.233532.

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McCutcheon, Murray William. « Nonlinear optics of multi-mode planar photonic crystal microcavities ». Thesis, University of British Columbia, 2007. http://hdl.handle.net/2429/31426.

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The nonlinear properties of multi-mode InP and Si planar photonic crystal microcavities are investigated in experiments relevant to integrated schemes for classical and quantum optical information processing. Normally incident, short laser pulses are used to coherently initialize the relative phase and amplitudes of two modes of a single-missing-hole InP microcavity. The two modes are orthogonally polarized, and separated by less than the bandwidth of the ~130 fs excitation pulses. The relative amplitudes of the two modes can be controlled by adjusting the polarization and the centre frequency of the excitation beam. Cross-polarized detection of the resonantly scattered light reveals a well-defined relative phase between the modes that is characteristic of their coherence. When the short-pulse excitation is used to coherently excite two modes in a three-hole line-defect (L3) InP microcavity, second-order harmonic radiation is observed due to the interactions of the resonant fields with the second-order nonlinear susceptibility (χ⁽²⁾) of the host InP slab. Second-harmonic and sum-frequency generated signals are observed due to the intra- and inter-mode nonlinear mixing of the microcavity fields. When a separate non-resonant pulse is focussed onto an InP microcavity, sum-frequency light is generated conditional to the resonant mode population of the microcavity. The conditionally generated signals can be tuned by tuning the frequency of the non-resonant pulse. All of the results can be explained with reference to the bulk χ⁽²⁾ properties of the InP slab. While the transient, multi-mode response of the microcavities is harnessed with the short-pulse technique, a continuous wave excitation laser exploits the local-field enhancement intrinsic to these wavelength-scale microcavities. A single-mode InP L3-microcavity with Q = 3,800 is pumped on resonance with a CW laser, and the 2D pattern of far-field second-harmonic radiation is directly imaged. The second-harmonic light is enhanced by 1000 times compared to non-resonant excitation, demonstrating integrated low-power frequency generation. The spatial pattern of the radiation is consistent with simulations based on the bulk χ⁽²⁾ tensor, and reveals the importance of scattering and material absorption of the harmonic light. Ultrafast, all-optical switching is demonstrated in a Si microcavity with a single Q = 35, 000 resonant mode. The mode is resonantly excited with a weak probe pulse, and a non-resonant 200 pJ pump pulse with a precisely controlled time delay is used to inject free-carriers above the silicon bandgap. The free-carrier dispersion shifts the mode frequency by 9 line-widths, and broadens its width by a factor of 4. When the excited mode is perturbed while it is ringing down, coherent oscillations in the spectra are observed which can be explained in terms of a model of an instantaneously perturbed harmonic oscillator, The implications for frequency conversion and for the generation of squeezed optical states are considered.
Science, Faculty of
Physics and Astronomy, Department of
Graduate
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Lombardini, Alberto. « Nonlinear optical endoscopy with micro-structured photonic crystal fibers ». Thesis, Aix-Marseille, 2016. http://www.theses.fr/2016AIXM4377.

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Dans cette thèse, nous proposons l'utilisation d'un nouveau type de fibre à cristal photonique, la fibre Kagomé à coeur creux, pour la livraison d'impulsions ultra-courtes en endoscopie non linéaire. Ces fibres permettent la livraison d'impulsions sans distorsion sur une large bande spectrale, avec un faible bruit de fond, grâce à la propagation dans le cœur creux. Nous avons résolu le problème de la résolution spatiale, à l'aide d'une microbille en silice, insérée dans le cœur de la fibre Kagomé. Nous avons développé un système d'imagerie compacte, qui utilise un tube piézo-électrique pour le balayage du faisceau, un système achromatiques de microlentilles et une fibre Kagomé double gaine, spécialement conçue pour l'endoscopie. Avec ce système, nous avons réussi à imager des tissus biologiques, à l'extrémité distale de la fibre (endoscopie), en utilisant des différentes techniques tels que TPEF, SHG et CARS, un résultat qui ne trouve pas d'égal dans la littérature actuelle. L'intégration dans une sonde portable (4,2 mm de diamètre) montre le potentiel de ce système pour de futures applications en endoscopie multimodale in-vivo
In this thesis, we propose the use of a novel type of photonic crystal fiber, the Kagomé lattice hollow core fiber, for the delivery of ultra-short pulses in nonlinear endoscopy. These fibers allow undistorted pulse delivery, over a broad transmission window, with minimum background signal generated in the fiber, thanks to the propagation in a hollow-core. We solved the problem of spatial resolution, by means of a silica micro-bead inserted in the Kagomé fiber large core. We have developed a miniature imaging system, based on a piezo-electric tube scanner, an achromatic micro-lenses assembly and a specifically designed Kagomé double-clad fiber. With this system we were able to image biological tissues, in endoscope modality, activating different contrasts such as TPEF, SHG and CARS, at the distal end of the fiber, a result which finds no equal in current literature. The integration in a portable probe (4.2 mm in diameter) shows the potential of this system for future in-vivo multimodal endoscopy
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Williams, Ceili. « Structure/property relationships in a polymorphic nonlinear optical crystal ». Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.314895.

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Hui, Pui Chuen. « Optomechanics and nonlinear mechanics of suspended photonic crystal membranes ». Thesis, Harvard University, 2014. http://nrs.harvard.edu/urn-3:HUL.InstRepos:13068536.

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The recent demonstration of strong interactions between optical force and mechanical motion of an optomechanical structure has led to the triumphant result of mechanical ground-state cooling, where the quantum nature of a macroscopic object is revealed. Another intriguing demonstration of quantum physics on a macroscopic level is the measurement of the Casimir force which is a manifestation of the zero- point energy. An interesting aspect of the Casimir effect is that the anharmonicity of the Casimir potential becomes significant when the separation of microscale objects is in the sub-100nm regime. This regime is readily accessible by many of the realized gradient-force-based optomechanical structures. Hence, a new avenue of probing the Casimir effect on-chip all-optically has become available. We propose an integrated optomechanical platform, consisting of a suspended photonic crystal membrane evanescently coupled with a silicon-on-insulator substrate, for (i) measuring the Casimir force gradient and (ii) counteracting the attractive force by exerting a resonantly enhanced repulsive optical gradient force. This thesis first presents the full characterization of the optomechanical properties of the system in vacuo. The interplay of the optical gradient force (optomechanical coupling strength \(g_{om}/2\pi=- 66GHz/nm\)) and the photothermal force manifested in the optical spring effect and dynamic backaction is elucidated. Static displacement by the repulsive force of 1nm/mW is also demonstrated. In the second part of the thesis, the nonlinear mechanical signatures upon a strong coherent drive are reported. By resonantly driving the photonic crystal membrane with a piezo-actuator and an optical gradient force, we observed mechanical frequency mixing, mechanical bistability and non-trivial interactions of the Brownian peak with the driving signal. Finally we present our recent progress in establishing electro- static control of individual photonic crystal membranes to reduce and calibrate the electrostatic artifact which plagues Casimir measurements. The results discussed in this thesis point towards an auspicious future of a complete realization of a Casimir optomechanical structure and novel applications with nonlinearity afforded by the Casimir force and the optical gradient force.
Engineering and Applied Sciences
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Ortigosa, Blanch Arturo. « Highly birefringent photonic crystal fibres : linear and nonlinear effects ». Thesis, University of Bath, 2002. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.760818.

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Wall-Clarke, Alex D. « Nonlinear effects in the Josephson-vortex terahertz photonic crystal ». Thesis, Loughborough University, 2013. https://dspace.lboro.ac.uk/2134/13222.

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Analysis has been made of the amplitudes of the second and third harmonics when pumping a discrete frequency to the Josephson-vortex photonic crystal within the THz range of the electromagnetic spectrum. The results of numerical simulations show that there are certain resonance frequencies for these harmonics where the amplitudes are strongly enhanced. The frequencies at which these resonances occur can be tuned by an applied magnetic field and tilting the material with respect to the incident radiation. For the second harmonic it has been possible to describe these resonances analytically with a resonance approximation which displays good agreement with numerical simulations at and near the resonances. A similar perturbative method has been used to simulate the nonlinear mixing of two discrete THz frequencies in the JV photonic crystal, producing resonances for harmonics at the sum and the difference of these two input frequencies. This method can allow a high degree of control over the harmonic frequencies produced.
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Livres sur le sujet "NONLINEAR CRYSTAL"

1

United States. National Aeronautics and Space Administration., dir. Organic nonlinear optical materials. Washington, DC : National Aeronautics and Space Administration, 1987.

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2

NATO, Advanced Study Institute on Nonlinear Phenomena Related to Growth and Form (1990 Cargèse France). Growth and form : Nonlinear aspects. New York : Plenum Press, 1991.

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3

Development of new nonlinear optical crystals in the borate series. Chur, Switzerland : Harwood Academic Publishers, 1993.

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4

V, Klimusheva Gertruda, Iljin Andrey G, Society of Photo-optical Instrumentation Engineers. et International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals (7th : 1997 : Partenit, Crimea, Ukraine), dir. Nonlinear optics of liquid and photorefractive crystals II : 5-10 October, 1997, Partenit, Crimea, Ukraine. Bellingham, Wash : SPIE, 1998.

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5

David, Lowenthal Dennis, Kalisky Yehoshua Y et Society of Photo-optical Instrumentation Engineers., dir. Nonlinear materials : Growth, characterization, devices, and applications. Bellingham, Wash., USA : SPIE, 2002.

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V, Klimusheva Gertruda, Iljin Andrey G, Society of Photo-optical Instrumentation Engineers. et International Meeting on Optical and Nonlinear Optical Phenomena in Liquid and Photorefractive Media (6th : 1995 : Danylivka, Hurzuf, Ukraine), dir. Nonlinear optics of liquid and photorefractive crystals : 23-30 October 1995, Ai-Danil, Crimea, Ukraine. Bellingham, Wash., USA : SPIE, 1996.

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V, Klimusheva Gertruda, Iljin Andrey G, Society of Photo-optical Instrumentation Engineers. Ukraine Chapter. et Society of Photo-optical Instrumentation Engineers., dir. Eighth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals : 2-6 October 2000, Alushta, Crimea, Ukraine. Bellingham, Washington : SPIE, 2001.

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V, Klimusheva Gertruda, Iljin Andrey G, Kostyukevych Sergey, Nat͡s︡ionalʹna akademii͡a︡ nauk Ukraïny. Institute of Physics. et Society of Photo-optical Instrumentation Engineers., dir. Ninth International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals : 30 September-4 October 2002, Alushta, Crimea, Ukraine. Bellingham, Wash., USA : SPIE, 2003.

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D, Jacobs Stephen, dir. Selected papers on liquid crystals for optics. Bellingham, Wash., USA : SPIE Optical Engineering Press, 1992.

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T, Lin J., Society of Photo-optical Instrumentation Engineers. et New Mexico State University. Applied Optics Laboratory., dir. Growth, characterization, and applications of laser host and nonlinear crystals : 27-28 March 1989, Orlando, Florida. Bellingham, Wash., USA : SPIE--the International Society for Optical Engineering, 1989.

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Chapitres de livres sur le sujet "NONLINEAR CRYSTAL"

1

Khoo, I. C. « Liquid Crystal Nonlinear Optics ». Dans Frontiers of Polymers and Advanced Materials, 117–39. Boston, MA : Springer US, 1994. http://dx.doi.org/10.1007/978-1-4615-2447-2_10.

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Bosshard, Christian, Rolf Spreiter, Urs Meier, Ilias Liakatas, Martin Bösch, Matthias Jäger, Sabine Manetta, Stephane Follonier et Peter Günter. « Organic Materials for Second-Order Nonlinear Optics ». Dans Crystal Engineering : From Molecules and Crystals to Materials, 261–78. Dordrecht : Springer Netherlands, 1999. http://dx.doi.org/10.1007/978-94-011-4505-3_15.

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Johannsmann, Diethelm. « Nonlinear Interactions ». Dans The Quartz Crystal Microbalance in Soft Matter Research, 313–36. Cham : Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-07836-6_13.

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Avetissian, Hamlet K. « Induced Channeling Process in a Crystal ». Dans Relativistic Nonlinear Electrodynamics, 193–220. Cham : Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-26384-7_7.

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Clayton, John D. « Mechanical Twinning in Crystal Plasticity ». Dans Nonlinear Mechanics of Crystals, 379–421. Dordrecht : Springer Netherlands, 2010. http://dx.doi.org/10.1007/978-94-007-0350-6_8.

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Silbermann, Christian B., Matthias Baitsch et Jörn Ihlemann. « Crystal Kinetics and -Thermodynamics ». Dans Introduction to Geometrically Nonlinear Continuum Dislocation Theory, 15–26. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63696-8_3.

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Fejer, M., J. Nightingale, G. Magel, W. Kozlovsky, T. Y. Fan et R. L. Byer. « Nonlinear Optics in Single Crystal Fibers ». Dans Tunable Solid State Lasers for Remote Sensing, 141–45. Berlin, Heidelberg : Springer Berlin Heidelberg, 1985. http://dx.doi.org/10.1007/978-3-540-39765-6_38.

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Kono, K., et K. Shirahama. « Nonlinear Transport of the Electron Crystal ». Dans Physics and Chemistry of Materials with Low-Dimensional Structures, 175–89. Dordrecht : Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-015-1286-2_10.

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Salgueiro, José R., et Albert Ferrando. « Spatial Solitons in Nonlinear Photonic Crystal Fibers ». Dans Understanding Complex Systems, 139–71. Cham : Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-72218-4_6.

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Silbermann, Christian B., Matthias Baitsch et Jörn Ihlemann. « Nonlinear Kinematics of a Continuously Dislocated Crystal ». Dans Introduction to Geometrically Nonlinear Continuum Dislocation Theory, 5–13. Cham : Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-63696-8_2.

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Actes de conférences sur le sujet "NONLINEAR CRYSTAL"

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He, Q. Byron, Pochi Yeh, L. J. Hu, T. S. Yeh, S. P. Lin, C. H. Lin, S. L. Tu, S. J. Yang et Ken Hsu. « Fast Photorefractive Planar Gratings in Fe-LiNbO3 Crystal ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.wb2.

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Photorefractive crystals have been widely studied in recent years. The dynamic holographic nature, high-resolution, and energy coupling effect of photorefractive crystals make them especially useful in optical image processing, optical computing and optical interconnections [1]. Real-time optical image correlators have been demonstrated experimentally in a variety of photorefractive crystals [2, 3]. However, due to the angular selectivity of Bragg diffraction in volume gratings, shift invariance in these correlators is hardly achieved. In this paper, we present experimental studies of a thin photorefractive Fe-LiNbO3 crystal plate and report the first observation of planar gratings in the samples. Such planar gratings are useful in achieving shift-invariant real-time optical image correlators.
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Sinclair, A. G., I. S. Ruddock et R. Illingworth. « Optical Assessment of Single Crystal Fibres ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.we9.

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Single crystal fibres are grown by the Laser Heated Miniature Pedestal Growth technique [1] in lengths of up to ~ 50mm and with diameters in the range 50-500 μm. By this method, doped fibres, for example Cr3+ and Ti3+ in sapphire (alumina) for use in solid-state lasers or fibres of various nonlinear crystals may be produced. For laser action to be possible or for a fibre to be used in an optoelectronic device, there are several requirements to be met:- (i) the fibre diameter and cross-section must be uniform, (ii) the direction of the optic axis in an anisotropic crystal should be known, (iii) the fibre ends should be flat and preferably normal to the fibre axis, (iv) the fibre surface should be smooth so as to minimise scattering losses, and (v) for a fibre to be incorporated into a laser cavity a polarised Gaussian beam entering the fibre at one end must emerge from the other as a Gaussian beam of a known state of polarisation.
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3

Marowsky, G., E. Heinemann, M. Pinnow, F. H. Kreuzer, H. Leigeber et A. Miller. « Ferroelectric-Liquid-Crystal Controlled Anisotropie Second-Harmonic Generation ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.we25.

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Due to their spontaneous polar order and high degree of alignment ferroelectric liquid-crystals have recently attracted great interest as promising nonlinear materials. In particular thin layers of chiral (smectic-C*) molecules sandwiched between two glass slides (cf. Fig. 1) are considered as practical device concepts exhibiting bulk nonlinear response. We have applied optical second-harmonic generation (SHG) to unravel the mechanism of alignment of the liquid-crystalline matrix - a commercial liquid crystal mixture - and its interaction with an added siloxane of high second-order nonlinearity /1/, whose chemical structure is also indicated in Fig. 1.
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Moore, Gerald T., et Karl Koch. « Optical Parametric Oscillation with Intracavity Sum-Frequency Generation ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.we23.

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We present theoretical calculations of an optical parametric oscillator (OPO) containing, in addition to the OPO crystal, a crystal for intracavity sum-frequency generation (SFG). The latter crystal combines light at the pump frequency ω p with light at the OPO signal frequency ω s to produce the desired frequency ω d = ω p + ω s . Only the frequency ω s oscillates in the cavity. This system is modeled in the plane-wave approximation for both spatial orderings of the crystals. The pump power is ultimately converted to the desired radiation, to idler radiation of frequency ω i =2ω p – ω d , and to cavity losses at frequency ω s . Since the ω i and ω d radiation grows from zero on each pass, changes in the cavity length do not produce interference effects. The choice of crystal for the OPO is limited by the requirement that this crystal transmit the long-wavelength idler. With proper choice of design parameters, little pump power remains unconverted by the two crystals over an extended range of the incident pump intensity. In steady-state operation the ratio η of the photon flux emitted at ω d to the photon flux incident at ω p can be nearly 0.5.
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5

Rush, J. D., G. E. Holdcroft et P. L. Dunn. « Nonlinear properties of organic single crystal waveguides : a review ». Dans Nonlinear Guided-Wave Phenomena. Washington, D.C. : Optica Publishing Group, 1989. http://dx.doi.org/10.1364/nlgwp.1989.fb1.

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Waveguides with organic single crystals as the guiding region are the subject of much worldwide attention. Our own interests lie primarily in the fabrication of organic crystal cored fibres although waveguides with channel, ridge or wedge type profiles are very attractive structures from which to fabricate optical nonlinear devices. In this paper we will review the present worldwide status of the art in organic single crystal growth in waveguiding structures and the current nonlinear results. We will also address the problems that have to be solved before working devices can be demonstrated.
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Vieweg, Marius, Timo Gissibl et Harald Giessen. « Selectively Filled Photonic Crystal Fibers ». Dans Nonlinear Photonics. Washington, D.C. : OSA, 2010. http://dx.doi.org/10.1364/np.2010.ntha2.

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Yesharim, Ofir, Shaul Pearl, Joshua Foley-Comer, Irit Juwiler et Ady Arie. « Generating Spatially Entangled Qubits using Quantum Nonlinear Holography ». Dans Nonlinear Photonics. Washington, D.C. : Optica Publishing Group, 2022. http://dx.doi.org/10.1364/np.2022.nptu4g.3.

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We experimentally shape the quantum correlations of spatially entangled photon pairs in a two-dimensionally patterned KTiOPO4 crystal using nonlinear holography. Our method enables multi-dimensional engineering of quantum states directly using patterned nonlinear photonic crystals.
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8

Abbate, Giancarlo, Alessandro Ferraiuolo, Pasqualino Maddalena, Lorenzo Marrucci et Enrico Santamato. « Effect of Chiral Agents on the Optical Fréedeericksz Transition in a Homeotropically Aligned Nematic Film ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.md29.

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Mixtures of nematic liquid crystals (NLC) and cholesteric liquid crystals (CLC) have been widely studied in recent years mainly because of their practical interest in the realization of liquid crystal displays, e.g. twisted or supertwisted cells. Since the 70's it was well established that very small amounts of chiral agents, like CLC, can induce an helical structure on the equilibriun configuration of an NLC cell, modifying its response to external fields.1
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She, Weilong, Qi Wu, Qingxing Li, Zhenxin Yu, Qinglun Zhang et Huanchu Chen. « Optical Didode Effect in Mn:KNSBN Crystal ». Dans Nonlinear Optics. Washington, D.C. : Optica Publishing Group, 1992. http://dx.doi.org/10.1364/nlo.1992.tud6.

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Resently, a kind of induced optical diode effect has been observed by using two colliding He-Ne laser beams in Mn doped KNSBN crystal[1]. In this paper, we report the time characteristic of optical diode effect.
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Xiurong, Zhang, Zhang shuunxin et Chai yao. « Study Of New Nonlinear Crystal -CsLiB6O10 ». Dans Solid State Lasers : Materials and Applications. Washington, D.C. : Optica Publishing Group, 1997. http://dx.doi.org/10.1364/sslma.1997.wb4.

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Along with extensive application of solid ultraviolet laser, specially the nuclear fusion device go up for request more and more high. For example: large size, high quality, high resist damage and high convesion efficienty. to now, there are some shortcoming of the nonlinear crystals-BBO,LBO,KTP KDP ect, as small size, lowe resist damage and long growth period ect They are not satisfing above request So, it is necessary that research new nonlinear crystals continuously. The new UV NLO crystal-CsLiB6O10 (CLBO) have been reported by Y. Mori et al in 1995 (Japan). The advantages of CLBO crystal are large size, high resist damage, sort growth period and slight hygroscopic and very good NLO properties. We report on growth and the UV, NLO properties and application of CLBO cyrstal and compared with other borate crystals.
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Rapports d'organisations sur le sujet "NONLINEAR CRYSTAL"

1

Asher, Sanford A. Psec Nonlinear Optical Measurements on Photonic Crystal Materials. Fort Belvoir, VA : Defense Technical Information Center, décembre 2000. http://dx.doi.org/10.21236/ada392039.

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Clayton, J. D. Reformulation of Nonlinear Anisotropic Crystal Elastoplasticity for Impact Physics. Fort Belvoir, VA : Defense Technical Information Center, mars 2015. http://dx.doi.org/10.21236/ada614253.

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S. Enguehard et B. Hatfield. Web-interfaced Nonlinear Optical Waveguide and Photonic Crystal Simulator. Office of Scientific and Technical Information (OSTI), juin 2002. http://dx.doi.org/10.2172/936601.

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Thakur, Mrinal. Growth and Nonlinear Optical Studies of Organic Single Crystal Films. (AASERT). Fort Belvoir, VA : Defense Technical Information Center, août 2000. http://dx.doi.org/10.21236/ada381623.

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Thakur, Mrinal. Single Crystal Films and WaveGuides of Organic Materials ; Preparation and Nonlinear Optical Properties. Fort Belvoir, VA : Defense Technical Information Center, avril 2000. http://dx.doi.org/10.21236/ada379801.

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Ducharme, Stephen, W. P. Risk, W. E. Moerner, Victor Y. Lee et R. J. Twieg. Intracavity Frequency Doubling of a Nd:YAG Laser with an Organic Nonlinear Optical Crystal. Fort Belvoir, VA : Defense Technical Information Center, mars 1990. http://dx.doi.org/10.21236/ada222392.

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Smith, L. Inclusion Analysis and Absorption Measurement in Nonlinear Crystals. Office of Scientific and Technical Information (OSTI), août 2005. http://dx.doi.org/10.2172/884794.

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Jain, N. Analyzing algorithms for nonlinear and spatially nonuniform phase shifts in the liquid crystal point diffraction interferometer. 1998 summer research program for high school juniors at the University of Rochester`s Laboratory for Laser Energetics : Student research reports. Office of Scientific and Technical Information (OSTI), mars 1999. http://dx.doi.org/10.2172/362525.

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McCaughan, Lean. Ultrafast Optical Wavelength Shuffling Based on Nonlinear Photonic Crystals. Fort Belvoir, VA : Defense Technical Information Center, novembre 2001. http://dx.doi.org/10.21236/ada407999.

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Griffin, III, et Anselm C. Novel Liquid Crystals - Polymers and Monomers - As Nonlinear Optical Materials. Fort Belvoir, VA : Defense Technical Information Center, décembre 1987. http://dx.doi.org/10.21236/ada200075.

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