Bibliografie tematiche / Thermo-Optical modeling

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Letteratura scientifica selezionata sul tema "Thermo-Optical modeling"

Autore: Grafiati

Pubblicato: 31 agosto 2024

Ultima modifica: 12 luglio 2025

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Articoli di riviste sul tema "Thermo-Optical modeling"

Motygin, Vladimir, Natalja Iltchenko, Dmitry Polyshchuk, and Anna Veremienko. "New method for thermo-optical modeling in liquid crystals." Applied Optics 41, no. 23 (2002): 4870. http://dx.doi.org/10.1364/ao.41.004870.

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Kim, Kyoung Joon, Avram Bar-Cohen, and Bongtae Han. "Thermo-optical modeling of an intrinsically heated polymer fiber Bragg grating." Applied Optics 46, no. 20 (2007): 4357. http://dx.doi.org/10.1364/ao.46.004357.

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Askar, Sameh, Ahmed E. Abouelregal, Marin Marin, and Abdelaziz Foul. "Photo-Thermoelasticity Heat Transfer Modeling with Fractional Differential Actuators for Stimulated Nano-Semiconductor Media." Symmetry 15, no. 3 (2023): 656. http://dx.doi.org/10.3390/sym15030656.

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The term “optical thermoelasticity” is used to describe how the optical properties of a material change when it is heated or deformed mechanically. The issues of effective elastic and heat transfer symmetry are given particular focus. This study gives a new nonlocal theoretical formulation for a thermo-optical elastic material that can be used to describe how thermomechanical waves and plasma waves relate to the symmetry of semiconductor materials such as silicon or germanium. The suggested model includes the idea of nonlocal elasticity and a modified Moore–Gibson–Thompson (MGT) heat conduction equation with nonsingular fractional derivative operators. The heat transfer equation has been converted and generalized into a nonsingular fractional form based on the concepts of Atangana and Baleanu (AB) using the Mittag–Leffler kernel. The developed model is used to examine the effect of thermal loading by ramp-type heating on a free plane of unbounded semiconductor material symmetries. Using the Laplace transform approach, we may analytically obtain linear solutions for the investigated thermo-photo-elastic fields, such as temperature. The Discussion section includes a set of graphs that were generated using Mathematica to evaluate the impact of the essential parameters.

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Kim, Kyoung Joon, Avram Bar-Cohen, and Bongtae Han. "Thermo-optical modeling of polymer fiber Bragg grating illuminated by light emitting diode." International Journal of Heat and Mass Transfer 50, no. 25-26 (2007): 5241–48. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2007.06.038.

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Boutelier, D., and O. Oncken. "3-D thermo-mechanical laboratory modeling of plate-tectonics: modeling scheme, technique and first experiments." Solid Earth 2, no. 1 (2011): 35–51. http://dx.doi.org/10.5194/se-2-35-2011.

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Abstract. We present an experimental apparatus for 3-D thermo-mechanical analogue modeling of plate tectonic processes such as oceanic and continental subductions, arc-continent or continental collisions. The model lithosphere, made of temperature-sensitive elasto-plastic analogue materials with strain softening, is submitted to a constant temperature gradient causing a strength reduction with depth in each layer. The surface temperature is imposed using infrared emitters, which allows maintaining an unobstructed view of the model surface and the use of a high resolution optical strain monitoring technique (Particle Imaging Velocimetry). Subduction experiments illustrate how the stress conditions on the interplate zone can be estimated using a force sensor attached to the back of the upper plate and adjusted via the density and strength of the subducting lithosphere or the lubrication of the plate boundary. The first experimental results reveal the potential of the experimental set-up to investigate the three-dimensional solid-mechanics interactions of lithospheric plates in multiple natural situations.

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Zanuto, Vitor S., Otávio A. Capeloto, Marcelo Sandrini, Luis C. Malacarne, Nelson G. C. Astrath, and Stephen E. Bialkowski. "Analysis of the Thermo-Reflectivity Coefficient Influence Using Photothermal Pump–Probe Techniques." Applied Spectroscopy 71, no. 5 (2016): 970–76. http://dx.doi.org/10.1177/0003702816662888.

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Recent improvements in the modeling of photo-induced thermo–optical–mechanical effects have broadened the application of photothermal techniques to a large class of solids and fluids. During laser excitation, changes in optical reflectivity due to temperature variation may affect the photothermal signal. In this study, the influence of the reflectivity change due to heating is analyzed for two pump–probe photothermal techniques, thermal lens and thermal mirror. A linear equation for the temperature dependence of the reflectivity is derived, and the solution is tested using optical properties of semi-transparent and opaque materials. For semi-transparent materials, the influence of the reflectivity change in photothermal signals is less than 0.01%, while for opaque materials it is lower than 3%.

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Sobotka, Evelyn, Johannes Kreyca, and Erwin Povoden-Karadeniz. "Intragranular ferrite nucleation on MX carbonitrides and dislocations." Journal of Physics: Conference Series 2635, no. 1 (2023): 012028. http://dx.doi.org/10.1088/1742-6596/2635/1/012028.

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Abstract The competing mechanisms of ferrite nucleation on (Ti,V)(C,N) MX carbonitrides and dislocations, as well as their dependence on deformation, are investigated experimentally by thermo-mechanical treatments and via simulation. The impact of recrystallization and the resulting austenite grain size on intragranular ferrite nucleation is evaluated. The austenite-to-ferrite transformation temperatures, affected by different microstructures, are examined by isothermal uniaxial single-hit compression tests on a dilatometer DIL 805 and compared to thermal treatments without deformation. Different resulting microstructures are analyzed by using optical light microscopy. The experimental data is used for the validation of thermo-kinetic simulations with the mean-field modeling software MatCalc using the implemented models for the austenite grain evolution, the on-particle nucleation of ferrite on the surface of MX particles, the dislocation density evolution, and recrystallization.

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Louchev, Oleg A., Yoshiharu Urata, Masaki Yumoto, Norihito Saito та Satoshi Wada. "Thermo-optical modeling of high power operation of 2 μm codoped Tm,Ho solid-state lasers". Journal of Applied Physics 104, № 3 (2008): 033114. http://dx.doi.org/10.1063/1.2936967.

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Liu, Gang, Anh-Tuan Vu, Olaf Dambon, and Fritz Klocke. "Glass Material Modeling and its Molding Behavior." MRS Advances 2, no. 16 (2017): 875–85. http://dx.doi.org/10.1557/adv.2017.64.

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ABSTRACTPrecision molding is a replicative production method for the mass production of complex glass optics in high precision. In contrast to the traditional material removal process, such as grinding and polishing, the surface as well as the entire shape of the optical component is created by deforming glass at elevated temperatures using precise molding tools with optical surfaces. The molded glass components present high shape accuracy and surface finish after the molding process, therefore no further processing is required. During the molding process, the glass is heated in the molding tool up to above the transition temperature Tg, then pressed into desired shape and cooled down to approximately 200 °C. The precision glass molding is therefore a complex thermo-mechanical process, in which the glass lens undergoes uneven cooling speed and stress distribution. These lead to several drawbacks on the molded glass optics, such as form deviation, index change and fracture. In this study, FEM simulation was employed in order to achieve preliminary understanding of the molding process. The FEM model included viscoelasticity behavior of glass material (stress-relaxation, structure-relaxation and thermos-rheological simplicity), as well as thermodynamics model of the molding machine. In the form of a case study of a real molding example, the form deviation, index change and fracture of the molded glass optic were predicted in advance of the molding experiment by means of the numerical calculation of thermal shrinkage, volume change and stress distribution respectively. The good agreement between simulation results and molding experiment results proves the accuracy of the developed FEM model.

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Zhang, Qinghua, Bohayra Mortazavi, and Fadi Aldakheel. "Molecular Dynamics Modeling of Mechanical Properties of Polymer Nanocomposites Reinforced by C7N6 Nanosheet." Surfaces 4, no. 3 (2021): 240–54. http://dx.doi.org/10.3390/surfaces4030019.

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Carbon-nitride nanosheets have attracted remarkable attention in recent years due to their outstanding physical properties. C7N6 is one of the hotspot nanosheets which possesses excellent mechanical, electrical, and optical properties. In this study, the coupled thermo-mechanical properties of the single nanosheet C7N6 are systematically investigated. Although temperature effects have a strong influence on the mechanical properties of C7N6 monolayer, thermal effects were not fully analyzed for carbon-nitride nanosheet and still an open topic. To this end, the presented contribution aims to highlight this important aspect and investigate the temperature influence on the mechanical stress-strain response. By using molecular dynamics (MD) simulation, we have found out that the C7N6 monolayer’s maximum strength decreases as the temperature increase from 300 K to 1100 K. In the current contribution, 5% to 15% volume fractions of C7N6/P3HT composite were employed to investigate the C7N6 reinforcing ability. Significantly, the uniaxial tensile of C7N6/P3HT composite reveals that 10%C7N6 can enhance the maximum strength of the composite to 121.80 MPa which is 23.51% higher than the pure P3HT matrix. Moreover, to better understand the enhanced mechanism, we proposed a cohesive model to investigate the interface strength between the C7N6 nanosheet and P3HT matrix. This systematic study provides not only a sufficient method to understand the C7N6 thermo-mechanical properties, but also the reinforce mechanism of the C7N6 reinforced nanocomposite. Thus, this work provides a valuable method for the later investigation of the C7N6 nanosheet.

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Tesi sul tema "Thermo-Optical modeling"

Vega, Marlo. "Étude expérimentale et théorique des effets photo-thermiques ultra-rapides dans des réseaux de nanoparticules - application au contrôle local de la chimie de surface." Electronic Thesis or Diss., université Paris-Saclay, 2024. http://www.theses.fr/2024UPAST081.

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L'excitation de nanoparticules métalliques par des impulsions delumière ultra-brèves génère des effets photo-thermiques localisés capables d'altérer leurchimie de surface. Ce travail de recherche a pour objectif d'étudier et d'utiliser ceseffets dans le but de contrôler localement la distribution de molécules d'intérêt sur lesnanoparticules. Dans un premier temps, l'utilisation conjointe de mesures despectroscopie pompe-sonde et d'un modèle numérique thermo-optique ayant un nombreminimum de paramètres libres ont permis de mettre en évidence l'hétérogénéité deseffets photo-thermiques se produisant dans des nanostructures en forme de croixasymétriques.Par la suite, un protocole permettant de marquer spécifiquement la chimiede surface avec des nanoparticules de silice a été développé. Celui-ci a permis demettre en lumière la dégradation locale de molécules à la surface de nanostructuresilluminées par des impulsions très brèves. Pour une illumination à faible puissance,seules les molécules dans les zones de forts champs électriques sont dégradées. Ainsi,cela permet de marquer et de visualiser expérimentalement la distribution de ce dernierà la surface des structures avec une résolution de quelques dizaines de nanomètres. Cesrésultats ouvrent la voie au développement de capteurs plasmoniques optimisés pour ladétection de molécules en très faible concentration<br>The excitation of metal nanoparticles through short pulses of lightinduces localized photo-thermal effects capable of altering their surface chemistry. Thisresearch aims to investigate and harness these effects for the precise manipulation ofmolecule distribution on nanoparticles at a local level. Initially, employing both pumpprobespectroscopy measurements and a thermo-optical numerical model with minimalfree parameters, we outlined the heterogeneous nature of photo-thermal effects withinasymmetric cross-shaped nanostructures. Then, a methodology was developed tospecifically label the surface chemistry using silica nanoparticles. This labelingrevealed the localized degradation of molecules on the nanostructure's surface exposedto very short pulses. Under low-power illumination, only molecules within highelectricfield zones undergo degradation, enabling the experimental delineation andvisualization of electric field intensity distribution on the structure surfaces with a fewtens of nanometers resolution. These findings pave the way for the development ofplasmonic sensors optimized for the detection of molecules at very low concentrations

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Atti di convegni sul tema "Thermo-Optical modeling"

Gunyakov, V. A., V. P. Gerasimov, S. A. Myslivets, et al. "Planar Photonic Crystal with Thermo-Optical Switching." In Proceedings of LFNM 2006. 8th International Conference on Laser and Fiber-Optical Networks Modeling. IEEE, 2006. http://dx.doi.org/10.1109/lfnm.2006.251987.

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Jang, Woo-Yong, James Park, Robert Schueler, and Michael Noyola. "Multimodal image processing for characterizing high-temperature thermo-optical impact on imaging performance." In Optical Modeling and System Alignment, edited by Mark A. Kahan, Richard N. Youngworth, and José Sasián. SPIE, 2019. http://dx.doi.org/10.1117/12.2529295.

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Gelinas, Robert J., Said K. Doss, and Susarla S. Murty. "Thermo-optical modeling of flashlamp-pumped Zig-Zag labs." In AIP Conference Proceedings Volume 160. AIP, 1987. http://dx.doi.org/10.1063/1.36713.

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Di Varano, Igor, Klaus G. Strassmeier, Ilya Ilyin, Manfred Woche, and Hans J. Kaercher. "Integration of a thermo-structural analysis with an optical model for PEPSI polarimeter." In Integrated Modeling of Complex Optomechanical Systems, edited by Torben Andersen and Anita Enmark. SPIE, 2011. http://dx.doi.org/10.1117/12.914963.

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Pergament, A. K., N. A. Marchenko, and V. I. Pavlov. "Modeling of thermo-optical distortions in slabs under nonuniform loading conditions." In Second International Conference on Solid State Lasers for Application to ICF, edited by Michel L. Andre. SPIE, 1997. http://dx.doi.org/10.1117/12.294317.

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Liu, Weichen, Peng Wang, Mengquan Li, Yiyuan Xie, and Nan Guan. "Quantitative Modeling of Thermo-Optic Effects in Optical Networks-on-Chip." In GLSVLSI '17: Great Lakes Symposium on VLSI 2017. ACM, 2017. http://dx.doi.org/10.1145/3060403.3060457.

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Belikov, Andrey V., Alexei V. Skrypnik, and Vadim Y. Kurnyshev. "Modeling of structure and properties of thermo-optical converters for laser surgery." In Saratov Fall Meeting 2015, edited by Elina A. Genina, Valery V. Tuchin, Vladimir L. Derbov, et al. SPIE, 2016. http://dx.doi.org/10.1117/12.2229750.

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Mandal, Pradipta, Abhinav Rajan, and K. s. Reddy. "Thermo-Optical Modeling for Hyperbolic Cavity Receiver of 40 m2 Parabolic Dish Collector." In SWC 2023 - ISES Solar World Congress 2023. International Solar Energy Society, 2023. http://dx.doi.org/10.18086/swc.2023.03.07.

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Schöttl, Peter, Gregor Bern, De Wet van Rooyen, Anna Heimsath, Thomas Fluri, and Peter Nitz. "Solar tower cavity receiver aperture optimization based on transient optical and thermo-hydraulic modeling." In SOLARPACES 2016: International Conference on Concentrating Solar Power and Chemical Energy Systems. Author(s), 2017. http://dx.doi.org/10.1063/1.4984389.

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Louchev, Oleg A., Yoshiharu Urata, Norihito Saito, and Satoshi Wada. "Coupled thermo-optical modeling of high power operation of Tm, Ho:YLF solid-state lasers." In International Conference on Lasers, Applications, and Technologies '07, edited by Valentin A. Orlovich, Vladislav Panchenko, and Ivan A. Scherbakov. SPIE, 2007. http://dx.doi.org/10.1117/12.751893.

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