【摘 要】
：
Nonlinear optical(NLO)crystals can be employed to expand the laser frequency and thus are of technical importance in advanced laser science.Noncentrosymmetric rare earth compounds keep attracting broad interest as a significant branch of NLO materials bec
【机 构】
：
College of Chemistry and Chemical Engineering,Shanghai University of Engineering Science,Shanghai 20
论文部分内容阅读
Nonlinear optical(NLO)crystals can be employed to expand the laser frequency and thus are of technical importance in advanced laser science.Noncentrosymmetric rare earth compounds keep attracting broad interest as a significant branch of NLO materials because the highly distorted structural motifs centered by rare earth ions could remarkably benefit the second harmonic generation.In this review,we proceed from structure-properties relationship and reveal the role of rare earth element in the optical properties of NLO materials.We believe that this work can deepen the understanding of rare earth-based NLO materials and provide some enlightenment for exploring novel practical NLO crystals.
其他文献
The growth of high-quality and large-size cerium-doped lutetium yttrium orthosilicate(Ce∶(LuY)2SiO5,Ce∶LYSO)crystals with lower cost has great influence on their applications in various physical devices.According to the chemical bonding theory of single c
结构光测量是三维形貌测量重要方法之一,其中一步就是光栅解包裹。传统多频外差在实际解包裹时,由于外界环境或传感器因素会存在相位跳变,使得最终解包裹结果不准确。为降低传统多频外差解包裹过程中的相位误差,实现全场的相位展开,提出了一种改进的算法来抑制相位跳变,该算法使用误差范围约束,在此基础上利用了公式回带和多频外差展开的所有相位信息。所提算法通过仿真实验对比,减小了相位误差,通过三组真实实验进行分析,
在MKE1620 A外圆磨床上对18 CrNiMo7-6钢进行了磨削试验,采用改装的Kistler测力仪来进行磨削力的测量.采用理论与试验相结合的方法对测力仪进行标定,实现了磨削力的测量.对砂轮径向进给速度、工件转速和磨削宽度等磨削参数对磨削力的作用机制进行了研究,得到了横向磨削中要在保证磨削力变化较小的同时实现材料去除率的提高,可以通过增加工件转速的方法来实现.通过残余应力的测量,对磨削力对残余应力的作用机制进行了研究,揭示了磨削力起主要作用的情况下,残余应力均为残余压应力,且残余压应力随磨削力和磨削热
The single crystal scintillating optical fibers acting as the scintillators and light conductors show potential application in scintillating fiber array detectors with high spatial resolution.In this paper we report the growth of 0.2 at％Ce∶Y3Al5O12 single
In this work,Eu3+-doped CsPbCl2Br1 in borosilicate glass was successfully synthesized by the melt quenching annealing technique and crystallization method.This work reports a novel Eu3+-doped CsPbCl2Br1 perovskite quantum dots(QDs)glass with high sensitiv
Yb3+-doped phosphors have characteristic near-infrared(NIR)emissions,but their applications in phosphor-converted light-emitting-diodes(pc-LEDs)and Si solar cells are limited due to their mis-matching excitation spectra.Here,we selected nitride La3Si6N11(
基于机器视觉的方法是刀具监测的重要途径之一,具有无损、直观反映刀具状态的优点,但采集高质量的监测图像比较困难。在微细加工中,由于主轴转速快,刀具尺寸细小,刀具在图像中的角度与位置具有任意性,在线监测的难度较大。针对微细铣削加工中,光照分布不均匀的在位图像捕捉系统获取的位置与角度任意的刀具图像,研究了一种精确提取刀具图像中感兴趣区域(Region of Interest, ROI)的算法。利用Hou
Near infrared to near infrared(NIR-NIR)photo-stimulated persistent luminescence(PSPL)has shown excellent potential in high-resolution bioimaging for deep tissues.However,the PSPL in N1R-Ⅱ region(900-1700 nm)is still lacking.In this work,Ca2Ga2GeO7∶Yb3+,Tb
Effective colour modulation of upconversion emissions in lanthanide-doped nanomaterials becomes even more important for fundamental and applied research.Herein,on the one hand,by raising the content of doped Yb3+from 10 mol％to 50 mol％,a significant increa