In the present paper, aiming to broaden and manipulate the low frequency band gaps, an innovative structure with filling materials in a square lattice is proposed, where the spatial distribution of the materials has been optimized using an improved genetic algorithm. By analyzing the band structure...
square lattice 美 英 un.正方格子;正方形栅格 网络正方晶格;方形网格;方点阵 英汉 网络释义 un. 1. 正方格子 2. 正方形栅格 例句
offers the academic foundation of the existence of stop band by giving an example of two dimensional photonic crystal of square lattice,and demonstrates that dielectric rods in air background can generate a common band gap,which is called absolute photonic band gap,for both orthogonal polarization ...
3.The modified plane-wave expansion method for calculating quickly the band structure is used to study the band structure in two rectangle lattice 2D photonic crystals.利用快速平面波展开法研究了两种长方晶格光子晶体,发现它们在高频区都存在大带隙,经参数优化,原胞结构为“工”字形的光子晶体,最大绝对禁...
The space group that characterizes the entire structure results from the combined symmetries of the lattice and the basis. Since bases with different symmetries can be attached to a given lattice, one expects a greater number of space groups than lattices. In two dimensions, there are 4 systems...
3) square lattice 正方点阵 1. In this paper, we use plane wave algorithm to study the band gap structure of 2D phononic crystal with square lattices. 采用平面波算法研究了二维正方点阵声子晶体的禁带结构。 2. The plane wave expansion method is introduced to calculate the band gap for two-...
Spiral three-dimensional photonic-band-gap structure We found a general type of microscopic structure that can be arranged into various types of lattice to create photonic crystals with sizable band gaps. We ... A Chutinan,S Noda - 《Phys Rev》 被引量: 110发表: 1998年 Optical properties of...
We have considered phonon-induced superconductivity on a square lattice. The antiferromagnetic correlations that are present in high-temperature superconductors (HTSC) have been simulated by the staggered magnetic field. The Eliashberg equations have been generalized to account for the momentum dependent or...
form of a band structure,wh ch def nes some areas w th the ex stence of the band gaps may ex st. The the- oret cai caicuiat on can be soived w th e ther a fre uen- cy-doma n method such as the piane-wave expans on method [7] ,or a t me-doma n method such as the...
Using the plane wave expansion method, we studied the effects of hydrostatic pressure on the structure of TM bands in two-dimensional square-lattice photonic crystals. These crystals are composed of infinite cylindrical rods of GaAs embedded in air background. Initially, we studied regular photonic ...