多层介质光学膜系的误差分析——膜层厚度变化的灵敏度因子

文中推导了对于给定膜系的特定膜层的厚度变化的灵敏度因子计算公式，并给出了用计算机对不同膜系的计算实例。分析了厚度灵敏度因子对膜系透射光谱的灵敏谱段、灵敏膜层等特性的影响规律，并由此给出了确定膜层厚度允差的方法。     

"假想层"在Needlee法膜系设计中的应用

Needle法是一种强大的膜系设计方法,它的突出特点是不依赖于初始膜系的给定,几乎对各种膜系设计目标都能给出比较令人满意的设计结果。但它的物理模型不够清楚,很难从直观上理解。通过在Needle法的推导过程中引入“假想层”的概念,使Needle法的整个推导过程清楚明了、容易理解,改进后的Needle法依然保持了它原来的各种优点。最后用两个设计实例说明了这种改进的有效性。     

基于实数编码自适应遗传算法的膜系优化设计

提出一种基于实数编码自适应遗传算法的膜系设计新方法，并将该方法与常用设计方法及传统遗传算法设计结果进行比较．结果表明，在相同设计要求下，用实数编码自适应遗传算法可以得到更加合理的膜系结构．理论和实践均表明该方法是高效、可靠的．     

厚膜多层片式电感器研究

厚膜片式电感器具有创新设计的多层片式结构，用厚膜多层布线技术，对片式电感采用共烧工艺，进行了性能试验，研制了磁体－导体一体化结构（类似独石结构）的片式电感样品。     

基于光谱光学相干层析技术的膜系反射光谱测量

根据光谱光学相干层析(OCT)技术的原理,建立了光谱光学相干层析系统,并利用该系统测量了膜系的反射光谱。该方法通过傅里叶变换实现了光学相干层析信号光谱信息的提取,克服了传统反射测量方法测量结果不直观、受非测量面干扰等问题。测量所得的光谱反射率,与商业仪器的测量值吻合较好,均方差仅为0.0488。     

超大面积厚膜多层电路的研制

本文阐述了超大面积（150mm*100mm)厚膜多层板的制造技术及其应用。     

多铁性BiFeO3/SrTiO3多层膜的透射电镜研究

本文利用透射电子显微镜（TEM）研究了由磁控溅射法生长的多铁性BiFeO3/SrTiO3多层膜的微观结构。衍衬分析及高分辨电子显微（HRTEM）像显示出界面清晰的各个单层。BiFeO3外延生长在SrTiO3（001）衬底上,生长方向沿基体c轴。随着薄膜厚度的增加,即多层膜周期的加长,层与层之间界面不再平直。原子序数Z衬度成像,EDS线扫以及各种元素的能量过滤综合分析确定了多层膜的成分变化特征。     

涡旋光辐照多层介质膜温升的模拟

搭建了涡旋光在多层介质膜中的传输模型,分析了涡旋光垂直入射下膜系内的温升分布。结果表明,膜系内的温升分布与涡旋光入射面密切相关。当涡旋光在初始面入射时,膜系的温升区域集中在入射中心。当涡旋光在空间中传输一定距离后再入射膜系时,膜系温升区域向入射中心的两侧发散,且最大温升大于初始面入射时的温升。当传输距离足够远时,膜系最大温升随传输距离的增加而减小。另外,在一定传输距离内,膜系最大温升随拓扑荷数的增大而增加。传输距离足够远时,最大温升随拓扑荷数的增大而减小。     

Application of quantitative mobility-spectrum analysis to multilayer HgCdTe structures

For modern semiconductor heterostructures containing multiple populations of distinct carrier species, conventional Hall and resistivity data acquired at a single magnetic field provide far less information than measurements as a function of magnetic field. However, the extraction of reliable and accurate carrier densities and mobilities from the field-dependent data can present a number of difficult challenges, which were never fully overcome by earlier methods, such as the multicarrier fit, the mobility-spectrum analysis of Beck and Anderson, and the hybrid mixed-conduction analysis. More recently, to overcome the limitations of those methods, several research groups have contributed to development of the quantitative mobility-spectrum analysis (QMSA), which is now available as a commercial product. The algorithm is analogous to a fast Fourier transform in that it transforms from the magnetic-field (B) domain to the mobility (μ) domain. The QMSA converts the field-dependent Hall and resistivity data into a visually meaningful transformed output, comprising the conductivity density of electrons and holes in the mobility domain. In this article, we apply QMSA to both synthetic and real experimental data that are representative of modern multilayer HgCdTe structures. We discuss such features as the accuracy of the extraction of individual layer conductivities and average mobilities, reconstruction of the carrier mobility distribution within a particular layer, the resolution of two carriers with similar mobilities, and limits of the sensitivity.     

智能光网络多层生存性技术

分析了现有网络中独立的和层间协调的生存性机制,并且对基于GMPLS的智能光网络的多层生存性进行分析,可以看到智能光网络为多层网络生存性提供了更好的保证.     

Porous silicon multilayer stacks for optical biosensing applications

Porous silicon (PS) multilayer stacks were developed for their use as interference filters in the visible range. The optical behavior of these structures was previously simulated by the use of a computational program, from which the optical constants and thickness of the individual PS layers were determined. The possibility of using these structures as biosensors has been explored, based on the significant changes in the reflectance spectra before and after exposing the PS multilayer to proteins (antibodies). In particular, it is shown that there is a notably reduction of reflectance from PS structures when this material is exposed to polyclonal mouse antibodies. Thus, the experimental results open the possibility of developing biosensors based on the variation of the shape and/or position of the optical or photoluminescent spectrum from PS.     

多层介质薄膜膜层间界面粗糙度及光散射

利用泰勒霍普森相关相干表面轮廓粗糙度仪(Talysurf CCI)分别对基底和采用电子束热蒸发技术沉积的15层二氧,化钛(TiO2)和二氧化硅(SiO2)为膜料的介质高反膜的膜层间的界面粗糙度进行了研究,并对不同工艺下沉积的薄膜界面粗糙度以及不同基底粗糙度上沉积的薄膜的表面粗糙度进行了比较.实验结果表明:TiO2薄膜对基底或下表面粗糙度有较好的平滑作用,随着TiO2和SiO2膜层的交替镀制,膜层间表面粗糙度呈现出低高交替的现象,随着膜层层数的增加,膜层间界面粗糙度低高变化范围减小;采用离子束辅助沉积工艺时,膜层问界面粗糙度低高变化范围较小.总散射损耗的理论计算表明:中心波长处完全非相关模型下的总散射损耗小于完全相关模型下的总散射损耗.实验结果表明:界面粗糙度的相关度约为0.4.     

Compression of femtosecond optical pulses with dielectric multilayer interferometers

The group velocity dispersion of a multilayer thin film Gires-Tournois interferometer used for reflection of ultrashort optical pulses can be continuously tuned from positive to negative values at an extremely low loss in pulse energy. Thus, this device can be applied for compression of femtosecond pulses independent of the sign of the frequency chirp by simple angle tuning of the interferometer. This has been demonstrated with up-chirped 210 fs pulses which have been compressed to an almost transform-limited duration of 115 fs.     

一种新型多层介质悬置微带线漏波特性的分析

提出了一种多层介质悬置微带线天线结构,以改善天线的频扫特性.分析表明:该结构不仅可以确保天线工作在效率较高的天线模工作区,而且它的泄漏常数在相当宽的范围内随频率都能平坦地变化.对频率扫描天线能保证当波束扫描时,可以保持一个相对稳定不畸变的辐射方向图.     

波导多层光卡读出系统的研制

研制了适合于波导多层光卡(WMOC)的数据读出系统.该系统硬件主要包括了光卡器件、寻址部分、光学部分和信号读取与处理部分等多个单元;软件采用Visual Basic(VB)语言编程,设计了简单直观的操作界面,通过界面可以精确改变电控平移台的位置,实现对光卡寻址和显微放大光学单元的实时调节.该系统使用方便、具有很强的可操作性与实际应用价值.     

Method of optical interference testing error separation

During the testing of aspherical mirrors through the null compensation method,structural parameters observe changes which affect the test results of interference pattern.Several errors are induced due to the maladjustment among compensator,interferometer and the mirror under test.It is important for optical manufacturing,testing and the actual alignment process to distinguish between the aberrations arising from both surface errors and maladjustment of the null compensation testing system.The purpose of this paper is to obtain the real aspheric surface errors during the optical polishing process.In this work,we have established an error separation model to the least square method to separate the errors caused by the maladjustment of the testing system from the test results.Finally,the analysis and simulation results show that high precision figure errors can be obtained by separating the maladjustment errors.