您的位置: 专家智库 > >

天津市自然科学基金(08JCYBJC14600)

作品数:9 被引量:36H指数:3
相关作者:刘健孙华苗银萍赵启大刘波更多>>
相关机构:天津理工大学南开大学天津大学更多>>
发文基金:天津市自然科学基金国家自然科学基金国家重点基础研究发展计划更多>>
相关领域:电子电信理学电气工程机械工程更多>>

文献类型

  • 9篇中文期刊文章

领域

  • 4篇电子电信
  • 3篇理学
  • 2篇电气工程
  • 1篇机械工程
  • 1篇建筑科学

主题

  • 3篇ACOUST...
  • 2篇ALN
  • 2篇DEVICE...
  • 2篇MAGNET...
  • 1篇电池
  • 1篇电控
  • 1篇液晶
  • 1篇声速
  • 1篇太阳电池
  • 1篇退火
  • 1篇倾斜光纤光栅
  • 1篇周期极化
  • 1篇准相位匹配
  • 1篇自聚焦
  • 1篇微晶硅
  • 1篇相位匹配
  • 1篇量子
  • 1篇量子限制效应
  • 1篇滤波器
  • 1篇结尾

机构

  • 5篇天津理工大学
  • 3篇南开大学
  • 1篇天津大学

作者

  • 1篇吕福云
  • 1篇任广军
  • 1篇刘波
  • 1篇魏臻
  • 1篇赵启大
  • 1篇孙连婕
  • 1篇张楷亮
  • 1篇杨保和
  • 1篇薛玉明
  • 1篇袁育杰
  • 1篇苗银萍
  • 1篇吴晓国
  • 1篇张双根
  • 1篇耿新华
  • 1篇陈希明
  • 1篇姚建铨
  • 1篇姚江宏
  • 1篇黄章超
  • 1篇孙华
  • 1篇郭燕

传媒

  • 3篇Optoel...
  • 2篇光电子.激光
  • 1篇中国激光
  • 1篇光子学报
  • 1篇Scienc...
  • 1篇中国科学:物...

年份

  • 2篇2012
  • 2篇2011
  • 5篇2010
9 条 记 录,以下是 1-9
排序方式:
液晶电控调谐滤波器的研究被引量:4
2010年
理论分析了液晶调谐滤波器的调谐原理,利用岛津UV-23101分光光度计,通过对BL-009型向列相液晶透射比的测试,分析了可见光波段液晶透射比随电场的变化情况,作出了入射光波长从400~800nm时液晶透射比随电压变化的关系曲线,并就氩离子激光器两条谱线488nm和514.5nm进行了提取.
任广军姚建铨
关键词:液晶电控滤波器
Research on the piezoelectric response of cubic and he- xagonal boron nitride films
2012年
Boron nitride (BN) films for high-frequency surface acoustic wave (SAW) devices are deposited on Ti/AI/Si(111) wafers by radio frequency (RF) magnetron sputtering. The structure of BN films is investigated by Fourier transform infrared (FrlR) spectroscopy and X-ray diffraction (XRD) spectra, and the surface morphology and piezoelectric properties of BN films are characterized by atomic force microscopy (AFM). The results show that when the flow ratio of nitrogen and argon is 2:18, the cubic BN (c-BN) film is deposited with high purity and c-axis orientation, and when the flow ratio of nitrogen and argon is 4:20, the hexagonal BN (h-BN) film is deposited with high c-axis orientation. Both particles are uniform and compact, and the roughnesses are 1.5 nm and 2.29 nm, respectively. The h-BN films have better piezoelectric response and distribu- tion than the c-BN films.
陈希明孙连婕杨保和郭燕吴小国
关键词:PIEZOELECTRICITY
How to reduce the Al-texture in AlN films during film preparation被引量:1
2012年
The preparation of aluminum nitrogen(AlN) film without Al texture is of great significance for the manufacture of highperformance surface acoustic wave(SAW) device.We research the process factors which bring Al into AlN film due to radio frequency(RF) magnetron sputtering system,and discuss how the process parameters influence the AlN thin film containing Al.In the research,it is found that the high sputtering power,the low deposition pressures and low partial pressure of Ar can lead to growing Al-texture during AlN thin film preparation,and the experiment also shows that filling the chamber with nitrogen gas can recrystallize a small amount of Al composition into AlN film during the annealing process in the high temperature environment.
阴聚乾陈希明杨保和张倩吴晓国
关键词:DEPOSITION
准相位匹配晶体中超短脉冲传输的自聚焦效应被引量:5
2010年
建立了超短激光脉冲在准相位匹配晶体中传输的物理模型,并对修正后的非线性薛定谔方程进行了数值求解,获得了飞秒激光脉冲在周期极化铌酸锂晶体中传输的时空演化过程。模拟结果发现当入射基频光功率超过晶体自聚焦的临界功率时,发生自聚焦过程。自聚焦效应使激光脉冲在时域上产生分裂和在空间上发生聚焦。脉冲宽度随着传输距离的增加而逐渐减小,焦点处脉冲宽度最小;脉冲在空间上被聚焦,聚焦半径随着传输距离的增加而逐渐减小,焦点处半径最小,经过焦点后发散;脉冲峰值强度在焦点处最强,经过焦点后峰值强度逐渐降低。超短脉冲倍频过程中,自聚焦效应限制了准相位匹配晶体的长度。
张双根黄章超薛玉明吕福云姚江宏
关键词:非线性光学飞秒激光准相位匹配周期极化倍频自聚焦
高声速(100)择优取向AlN薄膜的制备和性能研究被引量:1
2011年
采用射频磁控溅射法,通过改变工艺参数在n型(100)Si片上制备了表面粗糙度小、以(100)面择优取向的AlN薄膜。研究了高温退火、N2结尾等工艺对AlN薄膜择优取向的影响。结果表明,增大工作气压有利于薄膜(100)面择优取向,但是随着工作气压升高薄膜沉积不均匀,通过退火可以减少这种缺陷;N2-Ar比低有利于(100)面择优生长,但是容易使薄膜含有Al成分,通过以N2结尾可以减少薄膜中的Al成分,并从分子平均自由程和能量角度探讨了其对AlN压电薄膜择优取向的影响。
郭燕陈希明杨保和孙连婕吴晓国
关键词:ALN薄膜退火
基于倾斜光纤光栅的相对湿度传感器被引量:20
2010年
提出了一种基于倾斜光纤光栅(TFBG)的包层上覆盖着聚乙烯醇(PVA)的空气相对湿度传感器,成功实现了对相对湿度在20~98%RH范围内的监测。研究发现,TFBG的透射功率在20~74%RH和74~98%RH2个相对湿度区域内分别呈现不同的线性变化,敏感度分别为2.52 dBm/%RH和14.95 dBm/%RH,并且在高湿度区有更高的敏感性。
苗银萍刘波刘健孙华赵启大
关键词:光纤传感器
Test method of frequency response based on diamond surface acoustic wave devices
2011年
In order to reduce the noises affixed to the signals when testing high frequency devices,a single-port test mode(S11) is used to test frequency response of high frequency(GHz) and dual-port surface acoustic wave devices(SAWDs) in this paper.The feasibility of the test is proved by simulating the Fabry-perot model.The frequency response of the high-frequency dual-port resonant-type diamond SAWD is measured by S11 and the dual-port test mode(S21),respectively.The results show that the quality factor of the device is 51.29 and the 3 dB bandwidth is 27.8 MHz by S11-mode measurement,which is better than the S21 mode,and is consistent with the frequency response curve by simulation.
陈希明杨保和吴小国吴佚卓
关键词:ACOUSTICSTESTING
Influence of p-layer on the performance of n-i-p μc-Si:H thin film solar cells被引量:2
2010年
The high pressure radio frequency plasma enhanced chemical vapor deposition (RF-PECVD) process was adopted to prepare the n-i-p microcrystalline silicon solar cells,the influence of p-type layers on the performance of the solar cells was investigated,and the optimum p layer suited to the n-i-p microcrystalline silicon solar cells was obtained.The experimental results demonstrate that the performance of the solar cells can be highly affected by the structural and optical properties of the p-layers,and the performance of solar cells can be greatly improved by optimizing p layers.We have achieved an initial active-area efficiency of 8.17% (V oc =0.49 V,J sc =24.9 mA/cm 2 ,FF=67%) for the μc-Si:H single-junction n-i-p solar cells and an initial active-area efficiency of 10.93% (V oc =1.31 V,J sc =13.09 mA/cm 2 ,FF=64%) for the a-Si:H/μc-Si:H tandem n-i-p solar cells.
YUAN YuJie 1,2,ZHANG KaiLiang 1,2,WEI Zhen 1,2 & GENG XinHua 3 1 College of Electronics Information Engineering,Tianjin University of Technology,Tianjin 300384,China
关键词:MICROCRYSTALLINESOLARQUANTUMCONFINEMENTP-TYPELAYERS
n-i-p微晶硅太阳电池中p型掺杂层对其性能的影响被引量:3
2010年
采用高压高功率RF-PECVD技术,研究了三个系列的p层微结构特性和光学特性对电池性能的影响,获得了适合n-i-p微晶硅太阳电池的p型掺杂层.实验结果表明,p层的微结构特性与电池性能密切相关,具有特定结构的p层能够使电池性能大幅度提高,获得转换效率为8.17%(Voc=0.49V,Jsc=24.9mA/cm2,FF=67%)的单结微晶硅太阳电池及转换效率为10.93%(Voc=1.31V,Jsc=13.09mA/cm2,FF=64%)的叠层太阳电池.
袁育杰张楷亮魏臻耿新华
关键词:微晶硅太阳电池量子限制效应
共1页<1>
聚类工具0