Lithium niobate (LiNbO3) is one of the most commonly used optical crystals because of its excellent electro-optic and nonlinear optical properties. Ease of waveguide fabrication and amenability to periodic poling has made lithium niobate highly attractive for quasi-phase-matched guided wave interactions such as second harmonic generation (SHG) and optical parametric amplification/oscillation [1...

– We have derived the local electric field inside graded metal-dielectric composite films with weak nonlinearity analytically, which further yields the effective linear dielectric constant and third-order nonlinear susceptibility of the graded structures. As a result, the composition-dependent gradation can produce a broad resonant plasmon band in the optical region, resulting in a large enhanc...

In this work, we theoretically study the optical properties of a graphene nanoribbon with quantum dot (QD) on it. The system consists dimensions 400 × 3100 (nm2) and nanoscale radius. is symmetrically located at center to simplify mathematical model. To calculate (susceptibility) system, broadband electromagnetic wave (0.5–2.5 μm) applied structure model dipole-dipole interaction. Considering i...

The susceptibility of a wide variety of a-amino acids to the action of Land of n-amino acid oxidases from different biological sources has been studied by a number of investigators (l-7). These studies have in general revealed the considerable differences in the rates of oxidation by these enzymes of amino acids of different chemical structure. It would perhaps be superfluous to undertake even ...

we solve the coupled mode equations governing the chalcogenide nonlinear fiber bragg gratings (fbgs) numerically, and obtain the bistability characteristics. the characteristics of the chalcogenide nonlinear fbgs such as: switching threshold intensity, bistability interval, on-off switching ratio are studied. the effects of fbg length and its third order nonlinear refractive index on fbg charac...

literature and culture are two inseparable issues. when we talk about the culture, the literature can also appear unconsciously, because the culture is composed of thoughts, feelings and emotions and the styles and personal ways of society, which as a general rule, can appear in terms of principles and respectful rules. the literature on the other hand, discloses and transmits these concepts to...

Standardized methodologies for determining the antifungal susceptibility of fungal pathogens is central to the clinical management of invasive fungal disease. Yeast-form fungi can be tested using broth macrodilution and microdilution assays. Reference procedures exist for Candida species and Cryptococcus yeasts; however, no standardized methods have been developed for testing the antifungal sus...

Based on one-dimensional single-electron infinite periodic models of transpolyacetylene, we show analytically that the overall permutation symmetry of nonlinear optical susceptibilities is, although preserved in bound-state molecular systems, no longer generally held in periodic systems. The overall permutation symmetry breakdown provides a natural explanation of the widely observed large devia...

A molecular field theory of the cholesteric ordering in nematic nanocomposites doped with chiral nanoparticles was developed taking into consideration dispersion interaction between rod-like nanoparticles. It shown that inverse pitch helical structure is proportional to anisotropy effective polarizability and gyration tensor a nanoparticle host. The enables one predict sense inversion induced b...

background candida species are normal microflora of  oral cavity, vagina, and gastrointestinal  tract. they are the third most prevalent cause of pediatric health care–associated  bloodstream fungal infection. this study aimed to provide an epidemiological feature of candidiasis and also presents an antifungal susceptibility profile of clinical candida isolates among children. materials and met...