鳍线结构光波导调制器的速度匹配及高档模计算

本文利用谱域法和谱域导抗法，以速度匹配为目标对鳍线结构铌酸锂（ＬｉＮｂＯ３）光波导行波调制器的横向结构各参数做了优化计算，包括作为鳍线基底的铌酸锂晶片厚度、鳍线槽宽及光波导位置，并计算了影响调制特性的高次模分布。     

鳍线结构光波导调制器的速度匹配及高次模计算

本文利用谱域法和谱域导抗法，以速度匹配为目标对鳍线结构铌酸锂（ＬｉＮｂＯ３）光波导行波调制器的横向结构各参数做了优化计算，包括作为鳍线基底的铌酸锂晶片厚度、鳍线槽宽及光波导位置，并计算了影响调制特性的高次模分布。     

单轴介质加载鳍线的谱域导抗法

本文通过分析和推导,将谱域导抗法扩展到单轴介质加载鳍线的特性分析。单轴介质的光轴方向既可平行又可垂直于介质分界面。通过对称双侧鳍线的有效介电常数的数值计算,验证了本文方法的正确性。     

介质覆盖微带天线辐射特性的研究

基于谱域导抗法和波矩阵技术,本文给出了介质覆盖微带天线的一种有效的数值分析方法。计算公式简单,易于程序化。数值结果和实测与已有文献的结果吻合良好。     

平面分层介质结构全波分析综述

本文综述了广义谱域导抗法，直线法及直线法的快速算法，全波离散镜象法等主要方法，并对各种方法的特点进行了比较，这些方法可有效地处理平面分层介质结构问题，文中包括作者近期的研究成果。     

多层介质覆盖矩形微带天线谐振频率的精确计算

本文将谱域导抗法推广应用于计算多层介质覆盖矩形微带天线的谐振频率，通过引入两种特殊的数值积分方法，解决了二维振荡函数无穷区间积分问题，获得了一些有用的结论。     

ENG-MNG介质组合填充矩形波导的TE模传播特性分析

提出了使用磁单负介质和电单负介质组合填充矩形波导结构,在填充波导内电磁场量纵向场法的基础上,应用边界条件得到了双层单负介质填充波导后传播常数解。研究了在不同的介电常数、磁导率和模式下,传播常数、频率和填充介质厚度之间的关系,提出按照一定比例关系和介质参数填充后的波导的带通传播特性。     

矩形手征微带天线的辐射特性

本文首先建立了有覆盖层的矩形手征微带天线的数学模型，应用谱域导抗法得到了不同区域中的说域并矢格林函数，借助矢量法数据分析了手征介质的本构和几何参数，以及矩形贴片的几何形状等参量对微带天线的谐振频率和方向图的影响程序，发现了一些有趣的现象。     

分析填充非均匀介质矩形波导的一种新方法

用已提出的新的分析任意截面槽波导的傅立叶展开-差分法对填充非均匀介质的矩形波导进行了分析,验证了其正确性,并对一种填充具有周期分布介质的矩形波导的截止特性和色散特性进行了数值计算和分析。该方法可以便捷地解决波导在微波毫米波应用中的实际工程问题,对研究其它非均匀波导问题有一定的参考价值。     

部分介质填充槽波导色散特性的网络分析

本文给出了部分介质填充单槽和非对称双槽波导的横向等效网络。以此为基础,用微波网络方法分析了各种槽波导的色散特性,并将所得到的数据与用其它方法得到的结果进行比较,两者吻合好。证实本方法在保持有高的计算精度的情况下极大地简化了分析和求解过程。文中通过对宽带槽波导定向耦合器的具体设计,证明了本方法在槽波导电路分析和设计中的重要实际意义。     

Resolution Enhancement Technology:Integrated Process Solutions using OPC

DUV lithography, using the 248 nm wavelength, is a viable manufacturing option for devices with features at 130 nm and less. Given the low kl value of the lithography, integrated process development is a necessary method for achieving acceptable process latitude. The application of assist features for rule based OPC requires the simultaneous optimization of the mask, illumination optics and the resist.Described in this paper are the details involved in optimizing each of these aspects for line and space imaging.A reference pitch is first chosen to determine how the optics will be set. The ideal sigma setting is determined by a simple geometrically derived expression. The inner and outer machine settings are determined, in turn,with the simulation of a figure of merit. The maximum value of the response surface of this FOM occurs at the optimal sigma settings. Experimental confirmation of this is shown in the paper.Assist features are used to modify the aerial image of the more isolated images on the mask. The effect that the diffraction of the scattering bars (SBs) has on the image intensity distribution is explained. Rules for determining the size and placement of SBs are also given.Resist is optimized for use with off-axis illumination and assist features. A general explanation of the material' s effect is discussed along with the affect on the through-pitch bias. The paper culminates with the showing of the lithographic results from the fully optimized system.     

Cost-effective test solutions for smart card and other integrated flash applications

From its emergence in the late 1980s as a lower cost alternative to early EEPROM technologies, flash memory has evolved to higher densities and speedsand rapidly growing acceptance in mobile applications.In the process, flash memory devices have placed increased test requirements on manufacturers. Today, as flash device test grows in importance in China, manufacturers face growing pressure for reduced cost-oftest, increased throughput and greater return on investment for test equipment. At the same time, the move to integrated flash packages for contactless smart card applications adds a significant further challenge to manufacturers seeking rapid, low-cost test.     

Theoretical analysis of the relationship between the Brillouin gain coefficient and the strain in the optical-fiber sensors

The relation between the power of the Brillouin signal and the strain is one of the bases of the distributed fiber sensors of temperature and strain. The coefficient of the Bfillouin gain can be changed by the temperature and the strain that will affect the power of the Brillouin scattering. The relation between the change of the Brillouin gain coefficient and the strain is thought to be linear by many researchers. However, it is not always linear based on the theoretical analysis and numerical simulation. Therefore, errors will be caused if the relation between the change of the Brillouin gain coefficient and the strain is regarded as to be linear approximately for measuring the temperature and the strain. For this reason, the influence of the parameters on the Brillouin gain coefficient is proposed through theoretical analysis and numerical simulation.     

An improved parallel thinning algorithm with two subiterations

The parallel thinning algorithm with two subiterations is improved in this paper. By analyzing the notions of connected components and passes, a conclusion is drawn that the number of passes and the number of eight-connected components are equal. Then the expression of the number of eight-connected components is obtained which replaces the old one in the algorithm. And a reserving condition is proposed by experiments, which alleviates the excess deletion where a diagonal line and a beeline intersect. The experimental results demonstrate that the thinned curve is almost located in the middle of the original curve connectivelv with single pixel width and the processing speed is high.     

Novel fiber-optical interferometer with miniaturized probe for in-hole measurements

Today, micro-system technology and the development of new MEMS （Micro-Electro-Mechanical Systems） are emerging rapidly. In order for this development to become a success in the long run, measurement systems have to ensure product quality. Most often, MEMS have to be tested by means of functionality or destructive tests. One reason for this is that there are no suitable systems or sensing probes available which can be used for the measurement of quasi inaccessible features like small holes or cavities. We present a measurement system that could be used for these kinds of measurements. The system combines a fiber optical, miniaturized sensing probe with low-coherence interferometry, so that absolute distance measurements with nanometer accuracy are possible.     

Development of the readout system for waveguide multilayer optical card

Waveguide multilayer optical card （WMOC） is a novel storage device of three-dimensional optical information. An advanced readout system fitting for the WMOC is introduced in this paper. The hardware mainly consists of the light source for reading, WMOC, motorized stages addressing unit, microscope imaging unit, CCD detecting unit and PC controlling ＆ processing unit. The movement of the precision motorized stage is controlled by the computer through Visual Basic （VB） language in software. A control panel is also designed to get the layer address and the page address through which the position of the motorized stages can be changed. The WMOC readout system is easy to manage and the readout result is directly displayed on computer monitor.     

Study of waveguide coupling efficiency in hybrid silicon lasers

This paper presents a new method to increase the waveguide coupling efficiency in hybrid silicon lasers. We find that the propagation constant of the InGaAsP emitting layer can be equal to that of the Si resonant layer through improving the design size of the InP waveguide. The coupling power achieves 42% of the total power in the hybrid lasers when the thickness of the bonding layer is 100 nm. Our result is very close to 50% of the total power reported by Intel when the thickness of the thin bonding layer is less than 5 nm. Therefore, our invariable coupling power technique is simpler than Intel＇s.     

Collinear phase-matching study of terahertz-wave generation via difference frequency mixed in GaAs and Inp

The collinearly phase-matching condition of terahertz-wave generation via difference frequency mixed in GaAs and InP is theoretically studied. In collinear phase-matching, the optimum phase-matching wave hands of these two crystals are calculated. The optimum phase-matching wave bands in GaAs and lnP are 0.95-1.38μm and 0.7-0.96μm respectively. The influence of the wavelength choice of the pump wave on the coherent length in THz-wave tuning is also discussed. The influence of the temperature alteration on the phase-matching and the temperature tuning properties in GaAs crystal are calculated and analyzed. It can serve for the following experiments as a theoretical evidence and a reference as well.     

Effects of the alloy compositions on the phonon-polaritons in ternary mixed crystals

Composition dependence of bulk and surface phonon-polaritons in ternary mixed crystals are studied in the framework of the modified random-element-isodisplacement model and the Bom-Huang approximation. The numerical results for Several Ⅱ - Ⅵ and Ⅲ- Ⅴ compound systems are performed, and the polariton frequencies as functions of the compositions for ternary mixed crystals AlxGa1-xAs, GaPxAS1-x, ZnSxSe1-x, GaAsxSb1-x, GaxIn1-xP, and ZnxCd1-xS as examples are given and discussed. The results show that the dependence of the energies of two branches of bulk phonon-polaritons which have phonon-like characteristics, and surface phonon-polaritons on the compositions of ternary mixed crystals are nonlinear and different from those of the corresponding binary systems.     

New insert layer structure OLEDs

An insert layer structure organic electroluminescent device（OLED） based on a new luminescent material （Zn（salen）） is fabricated. The configuration of the device is ITO/CuPc/NPD/Zn（salen）/Liq/LiF/A1/CuPc/NPD/Zn（salen）/Liq/LiF/A1. Effective insert electrode layers comprising LiF（1nm）/Al（5 nm） are used as a single semitransparent mirror, and bilayer cathode LiF（1 nm）/A1（100 nm） is used as a reflecting mirror. The two mirrors form a Fabry-Perot microcavity and two emissive units. The maximum brightness and luminous efficiency reach 674 cd/m^2 and 2.652 cd/A, respectively, which are 2.1 and 3.7 times higher than the conventional device, respectively. The superior brightness and luminous efficiency over conventional single-unit devices are attributed to microcavity effect.