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Feasibility of Femtosecond Laser Writing Multi-Layered Bit Planes in Fused Silica for Three-Dimensional Optical Data Storage

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Chinese Physics Letters 2001年第4期18卷 541-543页

作者： LI Cheng-De WANG Dan-Ling LUO Le YANG Hong xia zong-ju GONG Qi-Huang State Key Laboratory for Mesoscopic Physics and Department of Physics Peking UniversityBeijing 100871

The ultrashort pulse laser writing multi-layered data bits in fused silica for three-dimensional optical data storage through the mechanism of optical damage induced by multi-photon absorption is *** 800 nm,120 fs Ti:Sapphire laser beam is focused into cubic samples with a 0.65 NA commercial microscope *** size of the recorded bits can be smaller than 0.5 × 0.5 × 2.5μm as the laser pulse energy is lower than 300 nJ and the corresponding bit data storage density is 0.2 × 10^(12) Tbits/cm^(3).Due to the aberration produced by the mismatch of the refractive indices between the recording material and its immersion medium,the longitudinal size of the recorded bit increases and the contrast of the bit to surrounding uninfected zone decreases as the bit plane gets *** a relatively lower storage density of 0.05 × 10^(12) Tbits/cm3 is realized.

关键词： Femto ultrashort Storage

Femtosecond Time-Resolved Near-Field Spectroscopy of CdSe Nanocluster Films

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Chinese Physics Letters 1999年第9期16卷 683-685页

作者： YAN Hong QIAN Wei DENG Yu-jun xia zong-ju ZOU Ying-hua ZHANG Jing-bo LIN Yuan xiaO Xu-rui Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 Institute of Photographic Chemistry Chinese Academy of SciencesBeijing 100101

By using scanning near-field optical microscopy in the femtosecond time-resolved pump-probe experiments, we have studied the time-resolved near-field spectroscopy of CdSe nanocluster films. The submicrometer space dependence of electron dynamics was observed, which is attributed to the non-uniform distributions of interstitial defects in the films.

关键词： pump Femto CdSe

Femtosecond Optical Kerr Effect of Surface Modified PbS Nanocrystals

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Chinese Physics Letters 1998年第3期15卷 192-194页

作者： AI Xi-cheng JIN Rong WANG Jing-jing xia zong-ju ZOU Ying-hua GUO Lin LI Qian-shu ZHU He-sun Department of Physics Mesoscopic Physics LaboratoryPeking UniversityBeijing 100871 College of Chemical Engineering and Materials Science Beijing Institute of TechnologyBeijing 100081

Surface modified PbS nanocrystals were fabricated by a novel method and their ultrafast optical nonlinearity was studied by the femtosecond time-resolved optical Kerr effect.A large nonlinear effect(χ^((3))~5×10^(-12) esu)with a laser pulse limited response was *** may be attributed to the reduction of surface trapped electrons due to the surface modification.

关键词： Femto Surface nonlinearity

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钠蒸汽中的三波光差频

物理学报 1989年第1期38卷 24-30页

作者：夏宗炬邹英华北京大学物理系

本文对各向同性介质中电四极矩跃迁共振增强的三波光差频过程进行了研究。在考虑原子电四极矩相互作用后,推导了二阶非线性极化率,并探讨了碰撞感生的二阶非线性光学过程出现的可能性。实验是在钠蒸汽中利用3s→4d电四极矩跃迁完成的。... 详细信息

本文对各向同性介质中电四极矩跃迁共振增强的三波光差频过程进行了研究。在考虑原子电四极矩相互作用后,推导了二阶非线性极化率,并探讨了碰撞感生的二阶非线性光学过程出现的可能性。实验是在钠蒸汽中利用3s→4d电四极矩跃迁完成的。实验结果与理论预言相符合。

关键词：钠蒸汽三波光差频

Hg蒸汽中通过双光子共振四波差频产生调谐真空紫外辐射

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物理学报 1990年第9期39卷 1385-1392页

作者：黄显玲夏宗炬邹英华北京大学物理系北京100871

利用Hg原子6~1S_0—6~1D_2和6~1S_0—6~3D_2双光子共振的四波差频(2ω_1—ω_3),获得了真空紫外相干辐射(ω_4)。当入射光之一(ω_3)波长调谐时,产生的真空紫外光也是调谐的,调谐范围为184.9-187.5nm.本文对非线性频率变换过程的机理,... 详细信息

利用Hg原子6~1S_0—6~1D_2和6~1S_0—6~3D_2双光子共振的四波差频(2ω_1—ω_3),获得了真空紫外相干辐射(ω_4)。当入射光之一(ω_3)波长调谐时,产生的真空紫外光也是调谐的,调谐范围为184.9-187.5nm.本文对非线性频率变换过程的机理,如双光子和单光子共振增强效应,相位匹配等进行了研究。对影响转换效率的有关竞争过程和饱和效应作了分析。利用产生的调谐真空紫外辐射记录了空气中O_2分子的吸收谱。

关键词： Hg 蒸汽双光子共振真空紫外辐射

飞秒瞬态反射谱研究YBa＿2Cu＿3O＿（7－δ）费密面变化与电声子耦合

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物理学报 1994年第11期43卷 1860-1865页

作者：熊光成邹英华夏宗炬袁平连贵君李洁北京大学人工微结构与介观物理国家重点实验室

利用飞秒脉冲激光与泵浦－探测技术测量了ＹＢａ＿２Ｃｕ＿３Ｏ＿（７－δ）（其中δ＝０．０，０．１，０．４，０．８）外延薄膜的瞬态反射率改变随时间变化曲线。由于氧含量的不同使得样品瞬态反射率改变随时间变化曲线有很大差异。... 详细信息

利用飞秒脉冲激光与泵浦－探测技术测量了ＹＢａ＿２Ｃｕ＿３Ｏ＿（７－δ）（其中δ＝０．０，０．１，０．４，０．８）外延薄膜的瞬态反射率改变随时间变化曲线。由于氧含量的不同使得样品瞬态反射率改变随时间变化曲线有很大差异。瞬态反射率改变随时间变化的曲线符号变化可以理解为氧含量的变化改变了样品费密面附近的能带结构。对实验数据的拟合表明δ＝．４　的样品电声子耦合远弱于高Ｔ＿ｃδ＝０的样品。

关键词： YBCO 飞秒瞬态反射谱超导体费密面变化

Recombination and repeat-induced point mutation landscapes reveal trade-offs between the sexual and asexual cycles of Magnaporthe oryzae

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Journal of Genetics and Genomics 2024年第7期51卷 723-734页

作者： Xifang zong Yaxin Lou Mengshuang xia Kunyang Zhao Jingxuan Chen ju Huang Sihai Yang Long Wang State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjingJiangsu 210000China State Key Laboratory for Crop Genetics and Germplasm Enhancement Bioinformatics CenterAcademy for Advanced Interdisciplinary StudiesNanjing Agricultural UniversityNanjingJiangsu 210000China Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjingJiangsu 210000China

The fungal disease caused by Magnaporthe oryzae is one of the most devastating diseases that endanger many crops *** shows that sexual reproduction can be advantageous for fungal diseases as hybridization facilitates ***,the pervasive clonal lineages of *** observed in natural fields contradict this expectation.A better understanding of the roles of recombination and the fungi-specific repeat-induced point mutation(RIP)in shaping its evolutionary trajectory is essential to bridge this knowledge *** we systematically investigate the RIP and recombination landscapes in *** using a whole genome sequencing data from 252 population samples and 92 cross *** data reveal that the RIP can robustly capture the population history of ***,and we provide accurate estimations of the recombination and RIP rates across different *** ***,our results highlight a parent-of-origin bias in both recombination and RIP rates,tightly associating with their sexual potential and variations of effector *** bias suggests a critical trade-off between generating novel allelic combinations in the sexual cycle to facilitate host-jumping and stimulating transposon-associated diversification of effectors in the asexual cycle to facilitate host *** findings provide unique insights into understanding the evolution of blast fungus.

关键词： Magnaporthe oryzae Crossover Repeat-induced point mutation(RiP) Effectors Sexual reproduction

The Global Dimensions of Crossed Products and Crossed Coproducts

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Acta Mathematica Sinica,English Series 2009年第5期25卷 831-844页

作者： Teng xia ju Department of Mathematics Nanjing University Nanjing 210093 P. R. China Faculty of Science Nantong University Nantong 226007 P. R. China

In this paper, we show that if H is a finite-dimensional Hopf algebra such that H and H^＊ are semisimple, then ***（A#σH）=***（A）, where a is a convolution invertible cocycle. We also discuss the relationship of global dimensions between the crossed product A^#σH and the algebra A, where A is coacted by H. Dually, we give a sufficient condition for a finite dimensional coalgebra C and a finite dimensional semisimple Hopf algebra H such that ***（C α H）=***（C）.

关键词： global dimension crossed products crossed coproducts twistings

Expression heterogeneity research of ITGB3 and BCL-2 in lung adenocarcinoma tissue and adenocarcinoma cell line

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Asian Pacific Journal of Tropical Medicine 2014年第6期7卷 473-477页

作者： zong-Jiang xia Wei Hu Yue-Bin Wang Kun Zhou Guo-ju Sun Department of Thoracic surgery the first Affiliated Hospital of Zhengzhou University Department of Cardiology the first Affiliated Hospital of Zhengzhou University

Objective:To analyze expression heterogeneity of Integrin beta 3(ITCB3) and B-cell lymphoma2(BCL-2) in lung adenocarcinoma tissue and adenocarcinoma cell line and further provide theoretical direction for molecular biological research of lung ***:Tissue microarray was used to observe relation among expression,heterogeneitpy and clinical characteristics of ITGB3 and BCL-2 in lung ***:ITGB3 and BCL-2 increased significantly in A549 cells in CAFs group with β-actin as control:the expression level of BCL-2also increased in 1TGB3 transfected cells with CFP plasmid transfected A549 cells as control:immunohistochemistry staining showed that positive ratcs of 1TGB3,ITGB1 and BCL-2 in normal lung tissues were *** positive rates in lung adenocarcinoma were 7.049%,84.51%and 4.23%,respectively:in the results of immunohistochemistrv staining,the expression of Girdin protein in lung adenocarcinoma was homogeneous,however protein expression of 1TCB3,ITGB1 and BCL—2showed different patterns in the same location with significant heterogeneity;majority of ITGB3,TTCB1 or BCL—2 positive tissue showed heterogeneity that expression in trailing edge was higher than that of trailing edge in lung adenocarcinoma tissue,the patients with BCL-2 heterogeneity showed higher lymph node metastasis ratio and lower clinical stage(P0.05).Conclusions:Expression of ITGB3 and BCL-2 in lung adenocarcinoma and adenocarcinoma cell line showed heterogeneity that expression in trailing edge was higher than that of trailing edge,which may play an important role in promoting tumor lymph node metastasis and vascular invasion,and provides a new research direction for exploration of lung adenocarcinoma metastasis mechanism.

关键词： Integrin B cell lymphoma Lung adenocarcinoma Heterogeneity