Nonlinear Optical Properties
Mostrando 13-24 de 61 artigos, teses e dissertações.
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13. Studies of optical, morphological and electrical properties of POMA/PMMA blends, using two different levels of doping with CSA
Poly(o-methoxyaniline) (POMA) was synthesized by oxidative polymerization of the monomer o-methoxyaniline. POMA/poly(methyl methacrylate) (PMMA) blends were produced by dissolving both polymers in chloroform (CHCl3).The amount of camphor sulfonic acid (CSA) used as dopant of POMA was different, providing two methods for preparation of the blends. Solutions w
Polímeros. Publicado em: 14/08/2012
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14. Influence of the substitutional solute on the mechanical properties of Ti-Nb binary alloys for biomedical use
Titanium alloys are widely used in the manufacture of biomedical implants because they possess an excellent combination of physical properties and outstanding biocompatibility. Today, the most widely used alloy is Ti-6Al-4V, but some studies have reported adverse effects with the long-term presence of Al and V in the body, without mentioning that the elastic
Materials Research. Publicado em: 05/04/2012
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15. Conversão em comprimento de onda de sinais modulados em fase por mistura de quatro ondas em SOAs / Wavelength conversion of phase modulated channels by four-wave mixing in SOAs
Recently semiconductor optical amplifiers (SOAs) have been the focus of interest in several applications. One of the most common SOA roles is as a wavelength converter, where the device transfers information content among optical carriers in the optical domain. Four wave mixing (FWM), cross-gain modulation (XGM), and cross-phase modulation (XPM) are major no
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/04/2011
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16. Estudos das propriedades estruturais e ópticas de vidros teluritos / Studies of the structural and optical properties of the tellurite glasses
Vidros teluritos são considerados fortes candidatos para aplicações em lasers e óptica não linear devido a importantes características, como o elevado índice de refração, baixa energia de fônons, baixa temperatura de transição vítrea e sua fácil preparação. Neste trabalho foram produzidas amostras dos sistemas vítreos TeO2- ZnO-Na2O, TeO2-Nb
Publicado em: 2011
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17. Propriedades Ãpticas dos vidros Er3+:PbPO4 / Optical Properties of the Er3+:PbPO4 Glasses
In this work we employ several techniques to investigate the optical properties of moderately high Er3+-doped lead phosphate (EDLP) glasses. The third-order optical susceptibility, χ3, and dispersion of the linear refractive index, n0(λ), of Er3+:PbPO4 were measured in the wavelength range between 400 and 1940 nm by using the spectrally resolved fe
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 02/07/2010
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18. Nonlinear thermotropic and thermo-optical behaviour of planar oriented textures in nematic liquid crystals at phase transitions
Thermotropic, thermo-morphologic and thermo-optical properties of the planar oriented nematic liquid crystals have been investigated for large temperature interval and especially for the direct nematic - isotropic liquid and the reverse isotropic liquid - nematic phase transition regions. Temperature dependences of the optical transmission, absorption coeffi
Brazilian Journal of Physics. Publicado em: 2010-06
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19. Propagação não linear de pulsos em estruturas 1D com band gap fotonico / Nonlinear pulse propagation in one-dimensional photonic band gap structures
The interaction of ultrashort optical pulses with photonic band gap materials has been studied by considering light propagation through one-dimensional photonic band gap structures, composed of a periodic multilayer stack of dielectric materials whose unitary cell consists of a pair of layers with different refractive indices n1and n2, respectively. One of t
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/08/2009
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20. Nonlinear optical properties of organic and organometallic compounds / Propriedades ópticas não lineares de compostos orgânicos e organometálicos
In the last few years, the design and characterization of novel materials exhibiting high optical nonlinearities is the subject of a fast-growing interest because of their potential application in various fields, from biology to photonics. Two-photon absorption processes, for example, have been used for optical limiting, three-dimensional microfabrication, o
Publicado em: 2009
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21. Calculations Properties Elements of Methanol Molecule Including Vibrational Corrections Correlation and Electronic / Calculos de Propriedades Eletricas da Molecula de Metanol Incluindo Correções Vibracionais e Correlação Eletrônica
In this work we report results for the polarizability, and rst and second hyperpolarizabilities of the methanol molecule including vibrational corrections and electron correlation eects. The Vibrational corrections were computed using the perturbation theoretic approach of Bishop and Kirtman and the electron correlation eects were taken into account through
Publicado em: 2009
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22. Calculos de Propriedades Eletricas da Molecula de Metanol Incluindo Correções Vibracionais e Correlação Eletrônica / Calculations Properties Elements of Methanol Molecule Including Vibrational Corrections Correlation and Electronic
In this work we report results for the polarizability, and rst and second hyperpolarizabilities of the methanol molecule including vibrational corrections and electron correlation eects. The Vibrational corrections were computed using the perturbation theoretic approach of Bishop and Kirtman and the electron correlation eects were taken into account through
Publicado em: 2009
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23. LIMITES OPERACIONAIS DO PROCESSO DE REVESTIMENTO POR CORTINA / OPERABILITY LIMITS OF THE CURTAIN COATING PROCESS
Curtain coating is one the preferred methods for precision multi-layer coatings at high speeds. Curtain coating belongs to the class of premetered coating methods. Liquid falls as a sheet, or curtain, freely over a considerable height and under the action of gravity before it impinges onto the substrate being coated. Edge guide are needed to maintain at spec
Publicado em: 2009
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24. Espectroscopia Ãptica nÃo linear de vidros especiais e colÃides
Nonlinear optical properties of special glasses and colloids were studied using the zscan technique. This technique aalows to calculate the nonlinear refraction index and the nonlinear absorption coefficient using the self-focusing or defocusing effect that appears when the incident laser pass through a nonlinear medium. Orthophosphate and polyphosphate anti
Publicado em: 2008