α-异(哑心)唑偶氮基-β-二酮类衍生物及其互变异构体的光谱

研究了5种新型的具有不同结构的α-异(哑心)唑偶氮基-β-二酮类衍生物的红外光谱和紫外光谱, 讨论了它们的酮式-烯醇式以及偶氮式-腙式之间的互变异构化现象. 结果表明, 所有化合物无论以固体形式或在溶液中均以腙式二酮体和偶氮式烯醇体的混合形式存在. 各化合物的紫外吸收谱均呈双峰状, 峰值分别处于246～262 nm和326～339 nm之间, 其中, 高波长吸收峰的强度明显高于低波长吸收峰强度, 说明了各化合物中偶氮式烯醇体形式均多于腙式二酮体形式, 其原因是由于各化合物中偶氮式烯醇体的异构体较多, 且易以分子内氢键形式形成六元环, 有利于结构稳定.     

Femtosecond laser induced defects in various silica glasses

The mechanism of near infrared (IR) focused femtosecond (fs) laser induced defects in silica glasses produced by different methods is systematically investigated through measurements of absorption, fluorescence, and electronic spin resonance (ESR) spectra. The influence of impurities and hydroxyl groups on defects is discussed. The results show that ES silica glasses containing high OH and few defects are much stable under fs laser irradiation. It is also verified that Si E_δ~′center formation has no direct relation with chloride ions.     

飞秒激光作用下光学玻璃和激光玻璃的光致暗化及其ESR研究

报道了多种商用光学玻璃和激光玻璃在800nm,120fs,1kHz脉冲激光作用下,产生光致暗化的阈值.并对照射前后的玻璃进行ESR分析,结果表明,光致暗化是由于玻璃内生成空穴捕获型色心的结果.认为玻璃在800nm飞秒激光照射后所产生的色心来源于玻璃的多光子吸收 关键词： 阈值 暗化 玻璃 飞秒激光 ESR     

薄膜厚度对AgInSbTe相变薄膜的光学性质的影响

采用射频溅射法制备了Ag8In14Sb55Te23相变薄膜,对深积态薄膜在300℃时进行了热处理,测量了不同厚度薄膜的反射、吸收谱及光学常数。研究了薄膜的光学常数与薄膜厚度的关系。结果表明在一定的厚度范围其光学常数随膜层厚度的不同有较大的变化,尤其在短波长范围内更为明显,这对于短波长记录相变光盘有重要意义。     

Femtosecond laser induced defects in various silica glasses

The mechanism of near infrared (IR) focused femtosecond (fs) laser induced defects in silica glasses produced by different methods is systematically investigated through measurements of absorption,fluorescence, and electronic spin resonance (ESR) spectra. The influence of impurities and hydroxyl groups on defects is discussed. The results show that ES silica glasses containing high OH and few defects are much stable under fs laser irradiation. It is also verified that Si E'δ center formation has no direct relation with chloride ions.     

用于新一代高密度可录光盘的有机材料研究进展

本文在总结近几年来国内外文献和专利报道的最新研究成果基础上，简要阐述了新一代高密度可录光盘的数据存储机理以及激光器工作波长与有机材料薄膜最大吸收波长相匹配的要求，介绍了在蓝(紫)光波段内(350～400nm)具有显著吸收的有机材料研究概况，并讨论了这些有机材料作为新一代高密度可录光盘数据存储介质的可能性。最后，对有机材料用于新一代高密度可录光盘数据存储介质的研究重点以及今后的发展前景进行简要讨论和展望。     

Readout of super-resolution marks with Ti thin film

Using Ti as the super-resolution reflective film to replace the Al reflective layer in conventional read-only optical disk, the recording marks with a diameter of 380 nm and a depth of 50 nm are read out in a dynamic testing device whose laser wavelength is 632.8 nm and numerical aperture of the lens is 0.40. The optimum Ti thin film thickness is 18 nm and the corresponding signal-noise-ratio is 32 dB.     

Spectroscopy and Optical Properties of Novel Metal（Ⅱ）-Azo Complex Films in Blue-Violet Light Region

A novel azo derivative,α-（2-azoxyisoxazole)-β-diketone derivative (ADD),and its copper (Ⅱ） and nickel （Ⅱ） complex (CuADD and NiADD) films have been prepared respectively by spin-coated method.The absorption spectra of the films on a K9 glass substrate in the 300-800 nm wavelength region have been measured.The optical constants (complex refractive index N=n iκ） and thickness of the complex films on a single-crystal silicon substrate in the 300-600nm wavelength region have been investigated on an improved rotating analyser-polariser (RAP) type of scanning ellipsometer,and the dielectric constants ε（ε=ε1 iε2),absorption coefficients α as well as reflectance R of the films were calculated.It is found that the absorption maxima of the ADD,CuADD and NiADD films are at 324nm,372nm and 385nm,respectively,and small absorption values and steep absorption band edges of the CuADD and NiADD films are observed at the 405nm side;The CuADD and NiADD films give high n values of 2.08 and 1.98,and low κ values of 0.2 and 0.28,respectively,at 405nm,and their thicknesses are in the range of 130-150nm;the high reflectivity of 58.5% and 45.5% of the CuADD and NiADD films with Ag as a reflective layer were obtained at the film thicknesses of 70 nm and 80nm respectively.These results show that the novel CuADD and NiADD films seem to be a very promising organic recording material for the next generation of high density digital versatile disc-recordable (HD-DVD-R) systems that use a high numerical aperture of 0.85 at 405nm wavelength.     

磷酸盐玻璃中Ce~(3+)、Tb~(3+)、Tm~(3+)的荧光光谱

在80～300K温度范围内,定量地测出了磷酸盐玻璃中Tb~(3+)、Tm~(3+)、Ce~(3+)的荧光光谱。用短脉冲光泵浦单掺或双掺玻璃样品,测出了稀土离子的时间分辨光谱,并进行了详细讨论。     

掺钛氟磷玻璃的时间分辨荧光光谱

对掺钛氟磷酸盐玻璃作了吸收光谱,荧光光谱和激发光谱的测定。该玻璃中,Ti~(3+)离了处于畸变八面体格位中。用紫外250～320nm电荷迁移带激发,可观察到可见区～0.55μm的发光。带宽～180nm,激发光谱的峰值位于290nm。同时分别测定了室温和77K时Ti~(3+)的时间分辨荧光光谱及弛豫光谱。随着延迟时间增加,低温下荧光峰值从510nm向长波方向移动到640nm。光谱显得弥散。而室温下变化较小。低温下荧光寿命为5～12μs,与发射波长有关。相反,室温下荧光寿命均为13μs,与发射波长无关。本文还对无机玻璃中Ti~(3+)的发光条件和可能性作了讨论。