【摘 要】
：
Based on the complementary media theory, we propose a way to transform a small object into a large one by coating it with a metamaterial shell with negative refractive index. Small waveguides made with this structure can replace large virtual tunnels to c
【机 构】
：
CollegeofInformation,MechanicalandElectricalEngineering,ShanghaiNormalUniversity,Shanghai201418,Chin
【出 处】
：
ChineseOpticsLetters
论文部分内容阅读
Based on the complementary media theory, we propose a way to transform a small object into a large one by coating it with a metamaterial shell with negative refractive index. Small waveguides made with this structure can replace large virtual tunnels to connect two separated waveguides. A small portal coating with complementary media is also designed in which a large entrance is concealed from electromagnetic wave detection. Two-dimensional numerical simulations are performed to illustrate the designed devices.
其他文献
A new high-performance laser scanning system is designed. In this system, a scanning arm consisting of a pentagonal prism and a scanning object lens is used to replace the traditional F \theta lens, and a circular imaging plate transmission mechanism is
基于三维荧光光谱法,以含有不同类型润滑油、机油、柴油、汽油的土壤样品为研究对象,分别提取不同土壤样品的三维荧光光谱,然后计算不同样品的荧光强度均值、标准差、重心横纵坐标、相关系数、长轴斜率、偏度和峰度等7个特征参数,并作为不同油类的识别特征。对7个特征参数进行主成分分析(PCA),前3个主成分累计贡献率为88.79%,但经聚类分析发现5w-40型润滑油和15w-40型润滑油的主成分混叠较强,无法准确实现分类。将经PCA得到的3个主成分作为反向传输人工神经网络的输入量,将石油烃有机物的种类作为输出量,以进行
描述了一个注入锁定的染料激光器,它是用脉冲氙离子激光器泵浦的若丹明6G四镜环形染料激光器,并且用氙离子激光输出线中的5960?作为注入光源、研究了注入锁定染料激光器的输出强度和光谱特性.
通过分析不同角度激光打靶条件下等离子体的辐射特性,发现在相同激光辐照功率密度下,激光垂直辐照等离子体产生铝的LPX强度要比激光斜入射辐照时明显增强,其中类氢离子跃迁线强度增长最为明显。实验结果还表明,激光斜入射辐照时LPX源沿靶面法线方向的尺寸变大,谐线变宽。
In this paper, the generation of dual-wavelength stable nanosecond pulses by a laser diode pumped Yb-doped double-clad fiber laser is presented. In the experiment, the fiber laser with two-mirror cavity is approved which operates in a self-Q-switching reg
Insulin resistance is a hallmark of the metabolic syndrome and type 2 diabetes. Dysfunction of PI-3K/Akt signaling was involved in insulin resistance. Glucose transporter 4 (GLUT4) is a key factor for glucose uptake in muscle and adipose tissues, which is
Based on the evaluation principle of the measuring uncertainty of the traditional coordinate measuring machine (CMM), the analysis and evaluation of the measuring uncertainty for optical micro-CMM have been made. Optical micro-CMM is an integrated measuri
国内外对DMD空间光调制的Hadamard变换成像光谱仪做了大量的理论研究和实验验证, 但这项技术的研究还不够成熟, 很多问题需要进一步的研究。在这种光谱仪中每个像素点色散光谱的编码矩阵互不相同。通过比较激光编码图像灰度值的变化并结合S矩阵元素的变化规律, 提出了一种光谱反演矩阵的标定方法。以七阶左移循环S矩阵为例设计编码模板, 通过两组成像实验对光谱反演结果进行了验证。在第一组实验中, 将一束激光波长为632.8 nm激光导入光谱仪中, 光谱仪的光谱响应范围为550~680 nm, 632.8 nm在第