In this paper, to generate slow light with large group index, wideband, and low dispersion in suggested line defect photonic crystal waveguide, a systematic optimization procedure is performed. Two structural parameters in the adjacent rows of the waveguide are carefully adjusted. Dispersion engineering in the proposed structure is done by using plane wave expansion method. By tuning the struct...

The materials with negative refractive index [1] (also known as left-handed media, LHM) have attracted a great deal of attention during recent years [2, 3, 4, 5, 6, 7, 8, 9, 10, 11]. However, despite numerous efforts to bring LHMs to optical or even THz domain [12, 13, 14], all modern realizations of these fascinating systems are limited to GHz waveguides[7, 9, 15, 16]. LHMs associated with mat...

We experimentally demonstrate reconfigurable photonic crystal waveguides created directly by infiltrating high refractive index (n≈2.01) liquids into selected air holes of a two-dimensional hexagonal periodic lattice in silicon. The resulting effective index contrast is large enough that a single row of infiltrated holes enables light propagation at near-infrared wavelengths. We include a detai...

A stable, hydrogen-defect structure of post-perovskite (hy-ppv, Mg1 xSiH2xO3) has been determined by first-principles calculations of the vibrational and elastic properties up to 150 GPa. Among three potential hy-ppv structures analyzed, one was found to be stable at pressures relevant to the lower-mantle D 00 region. Hydrogen has a pronounced effect on the elastic properties of post-perovskite...

Submit Manuscript | http://medcraveonline.com process important aspect of study [2-5]. The cleanliness of steel is a most required process of industry [6]. Various methods have been used to enhance the properties of steel during solidification. The continuous casting mold and submerged entry nozzles play an important part to produce the clean and defect free solidified slabs [7]. The melt flow ...

A higher-order compact scheme combined with the multigrid method is developed for solving Navier-Stokes equations along with pressure Poisson and energy equations in cylindrical polar coordinates. The convection terms in the momentum and energy equations are handled in an effective manner so as to get the fourth order accurate solutions for the flow past a circular cylinder. The superiority of ...

Recent ly the s ingle-impact hypothes is for forming the Moon has gained some favorable attention. We present in this paper a series of three-dimensional numerical s imulat ions of an impact be tween the protoear th and an object about 0.1 o f its mass . For computat ional convenience both objects were a s sumed to be composed of granite. We studied the effects on the ou tcome of the collision ...

Abstract Wind effects on a rain gage can cause a significant underestimation of rainfall depths and contribute to the inconsistency in rainfall data. To reconstruct rainfall data requires a consistent method to quantify the undercatch. Although some empirical adjustment factors have been recommended, they are not generalized enough to reflect the variations of wind speed with respect to height....

In this letter, we present a comparative study of positive bias temperature instability (PBTI) reliability in InxGa1−xAs FinFET with varying Indium (x = 0.53, 0.70) percentage and quantization [bulk, quantum well (QW)]. Due to lower effective transport mass and higher injection velocity, In0.7Ga0.3As QW FinFET provides better performance than In0.53Ga0.47As bulk FinFET. However, stronger quanti...

We calculate the current spatial distribution of projectile delivery to the Earth and Moon using numerical orbital dynamics simulations of candidate impactors drawn from a debiased Near-Earth-Object (NEO) model. Surprisingly, we find that the average lunar impact velocity is 20 km/s, which has ramifications in converting observed crater densities to impactor size distributions. We determine tha...