【摘 要】
:
In this paper,the fractal structure is introduced into one dimension photonic crystal.Forming the structure of photonic crystal like Cantor set,the Cantor-Like Fractal Photonic Crystal( CLFPC) is crea
【机 构】
:
Key Laboratory of Information Photonics and Optical Communications,Ministry of Education, Beijing Un
论文部分内容阅读
In this paper,the fractal structure is introduced into one dimension photonic crystal.Forming the structure of photonic crystal like Cantor set,the Cantor-Like Fractal Photonic Crystal( CLFPC) is created.The transmission spectrum of CLFPC with generator G=BAAB is theoreticsimulated,from which we can obtain a rule that the self-similarity of fractal structure of photoniccrystal can form a self-similar transmission spectrum. Then we create another CLFPC with genera-tor G=BAAAAB.By simulating and analyzing the group velocity curve of this kind of CLFPC,itcan be concluded that the group velocity of CLFPC is also self-similar according with its self-similarity in structure.The conclusion is that the fractal photonic crystals can performance a self-similar behavior because of the self-similarity in its fractal structure.
其他文献
Error control coding can be taken to mitigate atmospheric turbulence-induced signal fading in free-space optical (FSO) communication.In this paper,we study the analytical performance of coded FSO syst
提出了一种基于变分模型的红外/可见光图像配准方法。该方法在变分框架下,通过构造位移场演化的相似性度量函数项和惩罚调整项,得到准确的图像配准位移场。针对红外/可见光图像,选取互信息作为相似性度量函数项,同时,采用各项异性扩散方程作为惩罚调整项,防止演化过速。试验结果表明,该方法有效可行。
We analyze the security of the CV-QKD protocol with noisy coherent states,which is assumed to be induced a neutral party,Fred.Using the model, we prove the equivalence between the prepare and measurem
Service restoration and survivability have become increasingly important in telecommunications network planning.The introduction of SDH technology opens opportunities for survivable network architectu
全景式航空红外相机航拍时会产生像移,须采用像移补偿技术来提高红外相机分辨率和成像质量。本文针对TDI型全景式航空红外相机像移产生的原因进行了研究,并利用齐次坐标变换的方法推导了像移量和像移速度表达式。在此基础上,分析了实际应用中采用简化的像移补偿速度公式进行像移补偿所产生的像移补偿误差,并通过一个具体实例对这种误差进行了定量的分析,指出了这种误差对成像质量的影响程度。最后说明了陀螺稳定控制系统的精
Optical buffer is one of the critical components in optical packet switching (OPS) networks and has aroused extensive concerns.However,there has no unifted method to evaluate the performances of the o
针对当前众多企业建立Intranet网络应用系统,建立新型的浏览器/服务器(B/S)模式的企业内部网,本文设计了一套基于此模型多层体系结构的web数据库动态访问方案,实现了企业内部局域网之间的Intranet数据访问和共享,并已经应用于某企业Intranet的web开发实践中。
Since Light Emitting Diode (LED) offers several advantageous properties,it is expected to realize lighting and wireless communication synchronously.In this paper,an indoordata transrmssion system util
测试性日益成为现代电子产品的重要性能指标,必须在系统研制初期进行测试性设计,从而在故障诊断过程中,以最少的测试费用、在最短的时间内确定故障位置。文章根据贪婪策略提出了一种基于间接墒的测试优选算法。在故障隔离策略选择测试中,采用间接墒和贪婪策略想结合的方法进行测试优选。实验验证结果表明,该算法实现简单、能够在较短的时间内检测并隔离故障。
面向方面的软件分析和设计方法(AOSD)的出现很好地解决了上述问题,AOSD强调系统的基本构成是关注点,以此来组建系统。系统的关注点对应用例切片,系统各功能模块的耦合大大降低,软件的并行开发成为可能,提高了模块的可重用性和可维护性。本文研究的用例切片的合成主要是将编码前所抽象出来的逻辑上属于同一个类的方面合成到相关类中。