搜索结果: 1-15 共查到“知识库 导波发光”相关记录61条 . 查询时间(2.334 秒)
Testing of the transionospheric radiochannel using data from the global GPS network
total electron content GPS transionospheric radiochannel geomagnetic disturbances space weather
2015/9/17
Using the international ground-based network of two-frequency receivers of the GPS navigation system provides a
means of carrying out a global, continuous and fully-computerized monitoring of phase f...
Simulation of the microwave emission of multi-layered snowpacks using the Dense Media Radiative transfer theory: the DMRT-ML model
microwave emission multi-layered snowpacks
2014/12/12
DMRT-ML is a physically based numerical model
designed to compute the thermal microwave emission of
a given snowpack
亚波长金属波导的光传播和干涉特性研究
亚波长金属波导 传播特性 干涉特性 时域有限差分法
2013/9/22
利用时域有限差分方法研究了亚波长金属波导TE波的传播特性和基于异常透射现象的干涉特性.对各种参量对驻波特性的影响及两列波导间的耦合特性进行了分析.研究发现,TE波在波导中传播时存在截止宽度,如果波导宽度小于截止宽度,TE波在波导中不能传播;如果波导宽度大于截止宽度,TE波的传播距离将随波导宽度变大而突然增加.当波导宽度达到或大于半波长时,TE波可以在波导中正常传播.金属波导的截止宽度与金属的吸收系...
阵列波导光栅的平坦化在实际应用中有很重要的意义.本文系统地研究了阵列波导光栅的平坦化.在输入波导、输出波导、阵列波导输入端与输出端上分别引入了指数型锥形波导.通过改变锥形波导的形状和尺寸来实现平坦化的优化.本文首先从理论上论述了引入指数型锥形波导的输出光谱特性,给出了结构参量的关系表达式,阐明了输入波导处的锥形波导是影响输出光谱平坦化的主要因素,阵列波导和输出波导处的锥形波导对输出光谱的平坦化有一...
拦截弹自适应最优滑模制导和控制一体化设计
拦截弹 制导控制一体化 自适应 最优滑模
2014/4/9
针对传统制导和控制分开设计在拦截高速机动目标时的缺陷，设计了一种自适应最优滑模制导和控制一体化算法。首先基于零化视线角速率的思想，建立了制导和控制一体化模型；然后选取视线角速率为滑模面，结合HOSM鲁棒精确微分器参数，提出了一种最优滑模一体化制导和控制算法；最后设计了一种不确定性上界的自适应估计算法。仿真结果表明，与传统的制导和控制分开设计相比，所设计的一体化方法使得拦截弹具有更小的脱靶量，且姿态...
Hybrid-effect transmission enhancement induced by oblique illumination in nano-ridge waveguide
2011/11/24
In a nano-ridge waveguide under oblique illumination, we demonstrated transmission enhancement resulting from a hybrid effect between propagation modes and surface plasmon wave. The measured near-fiel...
Bragg Reflection Waveguide: Anti-Mirror Reflection and Light Slowdown
Bragg Reflection Waveguide Anti-Mirror Reflection Light Slowdown
2010/11/25
The e ect of the light group velocity reduction in dielectric Bragg re ection waveguide
structures (SiO2/TiO2) in the vicinity of the cuto frequency is studied experimentally.
Representations of the Dirac wave function in a curved spacetime
Representations Dirac wave function curved spacetime
2010/12/20
The Dirac wave function in a curved spacetime is usually defined as a quadruplet of scalar fields. It can alternatively be defined as a four-vector field.
A Series Solution to the Luminosity Distance in a Flat LCDM Universe
Cosmological distances Numerical methods
2010/12/21
Cosmological observations indicate that our universe is flat and dark energy (DE)dominated at present. The luminosity distance plays an important role in the investigation of the evolution and structu...
Coupled-resonator optical waveguides: Q-factor and disorder influence
Coupled-resonator optical waveguides Q-factor disorder influence
2010/11/16
Coupled resonator optical waveguides (CROW) can significantly reduce light propagation pulse velocity due to pronounced dispersion properties. A number of interesting applications have been proposed ...
Broadband waveguide quantum memory for entangled photons
Broadband waveguide quantum memory entangled photons
2010/10/18
The reversible transfer of quantum states of light in and out of matter constitutes an important building block for future applications of quantum communication: it allows synchronizing quantum inform...
结合有效折射率法和有限差分光束传播法,实现对三维光波导结构计算的降维处理,运用二维有效折射率——有限差分光束传播方法(EI-FD-BPM)计算Mach-Zehnder光波导开关的传输光场;通过比较不同的光波导结构,优化得到具有较高输出能量的条形光波导光开关及其最佳的结构设计参数(横截面尺寸,器件结构及其尺寸等).表明用二维 EI-FD-BPM方法代替三维有限差分光束传播(FD-BPM)方法进行光波...
平面介质光波导的一种矩阵解法
平面光波导 特征方程 矩阵方法
2009/9/1
本文将用于多层介质膜堆的矩阵表示方法应用于平面介质光波导中,提出一种简单而适用的获得特征方程的方法。
求金属包层平面光波导传播常数的图解法
金属包层光波导 传播常数 图解法
2009/8/31
本文提出一种分别得到金属包层平面光波导传播常数实部和虚部的图解法。这种方法直观、准确而且实用。