光抽运XeF(C-A)蓝绿激光器

利用分段表面放电作为光抽运源 ,采用光解离XeF2 技术 ,研制了一台 XeF(C A) 蓝绿激光器。抽运源有效激活长度为 6 0cm ,单位长度的沉积功率为 4 5MW /cm。在 2 5 0PaXeF2 / 6 0kPaAr/ 40kPaN2 条件下 ,采用平凹腔 ,输出耦合为 4% ,获得了XeF(C A)激光输出。对XeF(C A)激光特性参数进行了测量 ,输出能量为百毫焦耳量级 ,最大能量达 16 7mJ,激光脉宽～ 6 0 0ns ,辐射光谱范围 470～ 5 0 0nm ,发散角水平方向为 1 7mrad ,垂直方向为3 7mrad。     

光伏新材料——掺氮碳薄膜溅射制备技术及测试

介绍了采用氮气离子束溅射 ,高纯石墨为靶材 ,沉积掺氮碳薄膜的设备及工艺技术。对薄膜的沉积过程作了讨论 ,采用 X射线光电子能谱 (XPS)技术等对薄膜结构成分、氮 -碳、碳 -碳原子之间的键以及结合能作了研究 ,在 (1 1 1 )单晶硅片上沉积掺氮碳薄膜 ,构成 C/Si异质结 ,在 1 0 0 m W/cm2 光照下 ,开路电压达 2 0 0 m V。     

高功率中红外宽调谐全固态周期性极化铌酸锂光参量振荡器

中红外宽调谐激光器在激光光谱、拉曼光谱和大气污染探测、环保检测等领域有很多应用。目前主要采用光参量振荡 (OPO)输出中红外激光。本实验采用主动调Q的全固态Nd∶YVO4 激光器 ,输出波长为 1 0 6 4nm的准连续激光抽运周期性极化铌酸锂 (PPLN)晶体 ,实现OPO中红外激光输出。激光波长调谐范围为 2 90～ 4 0 5 μm ,最高输出功率为 2 76mW ,实验中同时输出波长范围为 1 4 4～1 6 6 μm的近红外激光。实验装置采用外腔OPO(见图 1 ) ,其抽运光源为LD抽运的Nd∶YVO4 激光器 ,输出重复频率为1 6 2kHz ,脉宽为 2 0 5ns ,平均功…     

碲镉汞衬底上沉积类金刚石薄膜的界面分析

采用等离子增强化学气相法 (PECVD)在碲镉汞 (MCT)衬底上沉积纳米颗粒的类金刚石薄膜 (DLC) ,对DLC MCT界面进行了俄歇电子能谱 (AES)分析 ,并与离子溅射法 (IS)沉积的ZnS MCT界面比较 ,结果表明DLC和ZnS薄膜都能较好地抑制MCT中HgTe的分解 ,在一定程度上阻挡了MCT中Hg的外扩散 .相对于ZnS中的S而言 ,DLC的C在MCT中的内扩散深度较小 (前者为 4 0 0 ,而后者仅为 2 0 0 ) .红外透射光谱结果表明DLC膜比ZnS膜具有更好的抗反射效果     

I_2和IBr分子光解产物的态分布及其多光子电离光谱的研究

本文报道了经多种激光波段解离I_2和IBr分子所生成的I(~2P_(3/2)~0)、I~*(~2P_(1/2)~0)和Br(~2P_(3/2)~0)、Br~*(~2P_(1/2)~0)原子的共振电离光谱。实验采用YAG激光泵浦的可调谐染料激光器,分别在470.0～490.0nm、364.7～369.0nm、277.5～282.5nm及222.0～223.2nm波长范围内,研究了I、Br原子的3+1、2+1及3+2、4+1电离过程中电离信号与光强的关系,标定了各个电离信号所对应的原子能级。本文通过对不同解离波长得到的I、Br原子电离谱的比较,定     

RF-PECVD法制备a-Si1-x Cx:H薄膜的光学性能研究

以SiH4和CH4为源气体,采用射频等离子增强化学气相沉积(RF-PECVD)方法,通过改变CH4/SiH4流量比和射频功率制备非化学计量比氢化非晶碳化硅(a-Si1-x Cx:H)薄膜.采用傅里叶转换红外光谱(FTIR)和紫外-可见(UV-Vis)光谱等测试手段,对薄膜的成键情况及其对光学带隙的影响进行了研究分析.结...     

外延生长6H-SiC/Si薄膜的微结构研究

采用 Si H4 -C3H8-H2 气体反应体系 ,通过 APCVD工艺在 Si(1 0 0 )衬底上进行 Si C薄膜生长时 ,严格控制缓冲层生长的工艺条件 ,即 1 3 0 0°C碳化温度较高的 C3H8饱和浓度 ,可以获得结晶质量良好的 6H-Si C单晶外延层。利用 SEM、X射线衍射能谱 (XRD)及光致发光谱 (PL)分析了薄膜微结构并讨论了其微观机制     

射频磁控溅射法制备GZO:Ti薄膜的微结构及其光学性质

采用射频(RF)磁控溅射工艺于玻璃衬底沉积了镓钛 共掺杂氧化锌(GZO:Ti)半导体薄膜,研究了沉积 温度对薄膜微观结构和光学性质的影响。通过X射线衍射仪(XRD)和紫外分光光度计对其晶体 结构和透射光谱特 性进行表征,同时利用光谱拟合法获取了薄膜的光学常数。研究结果表明,所有薄膜均具备 六角纤锌矿结 构和c轴择优取向特性,沉积温度对薄膜的微结构参数、光学 常数和光学带隙具有明显调控作用,当沉积 温度为653K时,GZO:Ti薄膜的晶粒尺寸最大(82.12nm)、位错密度最低(1.48×10－4 nm－2) 、微应变最小(0.001)、可见光区平均透射 率 最高(82.06%)及光学带隙值最大(3.57eV )。     

脉冲激光沉积法制备PZT铁电薄膜及衬底温度对膜的影响

采用脉冲激光沉积法在Si(10 0 )衬底上制备了Pb(Zr0 .52 Ti0 .4 8)O3 铁电薄膜 ,并用X射线衍射 (XRD) ,扫描电镜 (SEM )对其结构、形貌以及结构随沉积时衬底温度的变化进行了研究。由脉冲激光制备薄膜的机制出发 ,从PbO ,ZrO2 和TiO2 熔融体的化学反应及应力造成能量释放引起的相变两方面分析了铅基铁电薄膜制备时衬底温度的影响。     

单频激光抽运的石英光纤宽带受激拉曼散射实验研究

采用单频高功率Nd∶YVO4 激光的倍频光 (5 32nm)作为抽运源 ,激发长度为 2 5 0m和 92 0m的单模石英光纤 ,开展了石英光纤在可见光谱范围内的受激拉曼散射实验研究 ,获得了宽带宽的、第 1级到第 4级受激拉曼散射Stokes光谱 ,拉曼频移峰值分别为 4 5 0cm- 1 ,10 6 4cm- 1 ,16 10cm- 1 和 2 16 8cm- 1 。     

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.     

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.     

Teleportation of an arbitrary unknown N-qubit entangled state under the controlling of M controllers

A new quantum protocol to teleport an arbitrary unknown N-qubit entangled state from a sender to a fixed receiver under M controllers(M < N) is proposed. The quantum resources required are M non-maximally entangled Greenberger-Home-Zeilinger (GHZ) state and N-M non-maximally entangled Einstein-Podolsky-Rosen (EPR) pairs. The sender performs N generalized Bell-state measurements on the 2N particles. Controllers take M single-particle measurement along x-axis, and the receiver needs to introduce one auxiliary two-level particle to extract quantum information probabilistically with the fidelity unit if controllers cooperate with it.     

Diode-end-pumped Nd:YVO4/LBO lasers with 4.2W continuous-wave output at 457 nm

A continuous-wave (CW) 457 nm blue laser operating at the power of 4.2 W is demonstrated by using a fiber coupled laser diode module pumped Nd: YVO4 and using LBO as the intra-cavity SHG crystal With the optimization of laser cavity and crystal parameters, the laser operates at a very high efficiency. When the pumping power is about 31 W, the output at 457nm reaches 4.2 W, and the optical to optical conversion efficiency is about 13.5% accordingly. The stability of the out putpower is better than 1.2% for 8 h continuously working.     

Call for Papers

正Wireless Body-area Networks The last decade has witnessed the convergence of three giant worlds:electronics,computer science and telecommunications.The next decade should follow this convergence in most of our activities with the generalization of sensor networks.In particular with the progress in medicine,people live longer and the aging of population will push the development of wireless personal networks     

Call for Papers—Feature Topic,Vol.12,No.7,2015

正Information Centric Networking Information-Centric Networking(ICN) is an emerging direction in Future Internet architecture research,gaining significant tractions among academia and industry.Aiming to replace the conventional host-to-host communication model by a data-centric model,ICN treats data content as the first