光泵亚毫米波激光的喇曼过程相互作用

在小型光泵ＮＨ３分子亚毫米波激光器中，喇曼过程的相互作用变成一个重要的效应，它直接影响了激光器的输出强度和频谱特性。用大功率ＣＯ２－９Ｒ（１６）谱线泵浦ＮＨ３分子时，两个喇曼过程ｓ→ａＰ（７，０）和ｓ→ａＰ（７，１）相互作用导致彼此增强；而当ＣＯ２－９Ｒ（３０）谱线泵浦时，出现多个喇曼过程相互竞争的现象。     

亚稳态He(2~3S)原子与N_2H_4分子传能产物的发光研究

本文在流动余辉装置上,研究了亚稳态Ｈｅ（２~３Ｓ）原子与Ｎ２Ｈ４分子碰撞传能,观察到了激发态产物ＮＨ（Ａ３Π→Ｘ３∑＋）、 ＮＨ（ｃ１∏→ａ１△）、 ＮＨ２（Ａ２Ａ１→Ｘ２Ｂ１）的发射光谱,由相对光谱强度求得了形成各产物的通道比;分析 ＮＨ（Ａ３∏,ｖ′＝ ０）的转动分辨谱的结果表明,ｖ′＝０能级上的转动布居是“双模”分布, 激发态产物 ＮＨ（Ａ）、 ＮＨ２（Ａ）的形成机理可能是： Ｈｅ（２～３Ｓ＋Ｎ２Ｈ４→Ｎ２Ｈ４→ＮＨ（Ａ）＋ＮＨ２（Ａ）＋Ｈ．     

光泵NH3分子亚毫米波激光的喇曼过程相互增强与竞争

当用强脉冲ＣＯ２－９Ｒ谱线泵浦ＮＨ３分子时，两个喇曼过程ｓ→ａＰ（７，０）和ｓ→ａＰ（７，１）相互作用导致彼此增强；而当ＣＯ２－９Ｒ（３０）谱线泵浦时，出现多个喇曼过程的竞争，一些过程得到增强，另一些过程被削弱。     

复合物p—C6H4F2...NH3（ND3）外部振动的共振双光子电离光谱

利用共振光电离技术和飞行时间质谱技术,观察到了复合物ｐ－Ｃ６Ｈ４Ｆ２．．．ＮＨ３（ＮＤ３）的共振双光子电离光谱。光谱分析表明,复合物分子间的伸 振动频率为８６．４ｃｍ＾－１;由复合物光解离机理以及伸缩模的失谐参数与键有的关系。获得了复合物电子激发态Ｓ１和基态Ｓ０的键能信息。Ａｂｉｎｉｔｉｏ计算表明,ｐ－Ｃ６Ｈ４Ｆ２．．．ＮＨ３（ＮＤ）复合物的几何结构是：ＮＨ３分子中的Ｎ原子位于垂直ｐ－Ｃ６Ｈ４Ｆ２     

复合物p-C_6H_4F_2…NH_3(ND_3)外部振动的共振双光子电离光谱

利用共振光电离技术和飞行时间质谱技术,观察到了复合物 ｐ－Ｃ_６Ｈ_４Ｆ_２…ＮＨ_３（ＮＤ_３） 的共振双光子电离光谱．光谱分析表明。复合物分子间的伸缩振动频率为 ８６．４ ｃｍ~（－１）;由复合物的 光解离机理以及伸缩模的失谐参数与键能的关系,获得了复合物电子激发态 Ｓ_１和基态 Ｓ_０的键能 信息．Ａｂ ｉｎｉｔｉｏ　计算表明,ｐ－Ｃ_６Ｈ_４Ｆ_５…ＮＨ_３（ＮＤ_３）复合物的几何结构是：ＮＨ_３分子中的 Ｎ 原子位于垂直于ｐ－Ｃ_６Ｈ_４Ｆ_２分子环面的对称轴（Ｚ轴）上,距环面的高度为 ０．３５２ｎｍ; ＮＨ_３的 Ｃ_３轴与ｐ－Ｃ_６Ｈ_４Ｆ_２的对称轴夹角是 ５２．５°;且一个氢原子朝向环面; ＮＨ_３可绕 Ｐ－Ｃ_６Ｈ_４Ｆ_２分子 的Ｚ轴近似的自由转动．键能计算值和预计存在的内转动与实验吻合．     

InCl分子B~3∏_1态时间分辨谱研究

采用激光诱导荧光技术对ＩｎＣｌ分子 Ｂ３∏１→Ｘ１∑＋荧光光谱进行了分析和归属,并对Ｂ３∏１（ｖ’＝０）→Ｘ１∑＋（ｖ＂＝０）的时间分辨谱进行了观测．首次得到ＩｎＣｌ分子Ｂ２∏１态（ｖ＇＝０）无碰撞辐射寿命 ０≈３５３ｎｓ;无辐射弛豫速率常数ｋＱ≈１．９８５×１０－１０ｃｍ３ｍｏｌｅｃ－１ｓ－１及电子跃迁矩｜Ｒｅ｜２＝ ０．４０Ｄ２．     

1.3μm和1.55μm Si_(1-x)Ge_x波长信号分离器与Si_(1-x)Ge_x/Si应变超晶格探测器的集成

对１．３μｍ和１．５５μｍ波长的Ｓｉ１－ｘＧｅｘ波长信号分离器（ＷＳＤ）和Ｓｉ１－ｘＧｅｘ／Ｓｉ应变超晶格（ＳＬＳ）红外探测器的集成结构进行了系统的分析和优化设计．优化结果为：（１）对Ｓｉ１－ｘＧｅｘＷＳＤ，Ｇｅ含量ｘ＝０．０５．波导的脊高和腐蚀深度分别为３μｍ和２．６μｍ．对应于λ１＝１．３μｍ和λ２＝１．５５μｍ波长的波导脊宽分别为１１μｍ和８．５μｍ．（２）对Ｓｉ１－ｘＧｅｘ／ＳｉＳＬＳ探测器，Ｇｅ含量ｘ＝０．５．探测器的厚度为５５０ｎｍ，由２３个周期的６ｎｍＳｉ０．５Ｇｅ０．５＋１７ｎｍＳｉ组成．     

氮化硅薄膜的PECVD生长及其性能研究

采用ＰＥＣＶＤ法，反应温度为２５０℃，反应气体为ＮＨ３，ＳｉＨ４，在抛光硅片上沉积０．２～０．４μｍ厚的氮化硅薄膜。对这种Ｓｉ３Ｎ４薄膜的光学性能和电学性能进行了测试，其光学折射率为１．８７５，电阻率及击穿场强分别为８×１０１６Ω·ｃｍ及１×１０７Ｖ／ｃｍ，并用ＦＴＩＲ谱分析了薄膜的化学结构。     

高迁移率Si／Si_（0．7）Ge_（0．3）／Si调制掺杂异质结构的生长和输运性质

采用计算机控制的快速辐射加热、超低压ＣＶＤ（ＲＲＨ／ＶＬＰ－ＣＶＤ）方法生长了Ｓｉ／Ｓｉ０．７Ｇｅ０．３／Ｓｉｐ－型调制掺杂双异质结构．研究了该结构的输运性质，其空穴霍尔迁移率高达３００ｃｍ２／Ｖ·ｓ（３００Ｋ，薄层载流于浓度ｐｓ为２．６e１３ｃｍ－２）和８４００ｃｍ２／Ｖ·ｓ（７７Ｋ，ｐｓ为１．１e１３ｃｍ－２）．     

钛宝石激光器泵浦Yb: YAG晶体薄片产生连续激光输出

目前，惯性约束核聚变（ＩＣＦ）激光驱动器前端系统中使用１．０５３μｍ激光波长。掺Ｙｂ３＋激光介质由于Ｙｂ３＋离子的吸收带位于０．９～１．１μｍ波长范围，能与ＩｎＧａＡｓ二极管泵浦源有效耦合，可获得１．０５３μｍ的激光输出，并具有较高的提取效率和长的荧...     

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.