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椭偏光谱

椭偏光谱的相关文献在1993年到2022年内共计73篇,主要集中在物理学、无线电电子学、电信技术、化学工业 等领域,其中期刊论文67篇、会议论文6篇、专利文献49585篇;相关期刊32种,包括国际学术动态、功能材料、光学精密工程等; 相关会议6种,包括第六届中国功能材料及其应用学术会议、第五届中国功能材料及其应用学术会议、第九届全国凝聚态光学性质学术会议等;椭偏光谱的相关文献由192位作者贡献,包括莫党、张晋敏、张曰理等。

椭偏光谱—发文量

期刊论文>

论文:67 占比:0.13%

会议论文>

论文:6 占比:0.01%

专利文献>

论文:49585 占比:99.85%

总计:49658篇

椭偏光谱—发文趋势图

椭偏光谱

-研究学者

  • 莫党
  • 张晋敏
  • 张曰理
  • 李辉遒
  • 褚君浩
  • 阳生红
  • 陈良尧
  • 余平
  • 刘毅
  • 孙兆奇
  • 期刊论文
  • 会议论文
  • 专利文献

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    • 张飞; 居靖淇
    • 摘要: 采用双洛伦兹模型和有效介质近似(Efficient Medium Approximation,EMA)色散模型对退火的Mn_(1.95)Co_(0.77)Ni_(0.28)O_(4)薄膜在近红外和中红外波段的椭偏数据进行了拟合。通过比较直流电压下测试的电导率与低频下计算的电导率(ω→0)发现,A谐振子主要产生传导电流,B谐振子主要产生位移电流。对于Mn_(1.95)Co_(0.77)Ni_(0.28)O_(4)薄膜,随着退火温度的升高,晶格共振吸收逐渐被电子共振吸收所取代。退火样品的折射率n和消光系数k均由退火过程决定。
    • 杜淼; 米菁; 张科; 杨海龄; 李世杰; 于庆河
    • 摘要: 通过控制氧气与氮气流量比,使用反应磁控溅射技术在抛光硅片表面制备TiAlON涂层.利用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)、光谱椭偏仪(SE)分析氧氮比对涂层的微观结构与光学性能的影响.结果表明,TiAlON涂层具有与TiAlN涂层相同的面心立方结构(NaCl型).随着溅射氧气分压的升高,涂层的柱状晶结构变得模糊.通过控制涂层的成分,TiAlON涂层的光学性质可由类金属特性向半导体特性以及陶瓷特性转变,说明TiAlON涂层具有可控的光学常数,可作为太阳能光谱选择性吸收涂层的候选材料.
    • 赵明琳; 刘宇翔; 连洁; 石玉君; 宋浩男; 贾艳丽; 金魁; 杨修伦
    • 摘要: 用激光脉冲沉积(PLD)方法,以MgA12O4(001)为衬底制备了过渡金属氧化物LiTi2O4薄膜.采用X射线衍射(XRD)对所制备材料进行结构测试,结果表明,材料具有立方尖晶石单相结构,结晶性能良好.应用拉曼光谱和光谱椭偏仪(SE)分别研究了材料在常温下的拉曼活性声子特性和可见-近红外波段的折射率和消光系数.应用第一性原理计算了LiTi2O4材料的能带结构和态密度,结果表明理论计算结果和实验测试结果具有很好的一致性,能带计算结果能够很好的解释薄膜的光学常数.%Transition-metal oxides LiTi2O4 thin film was epitaxially grown on MgAl2O4 (001) substrate by pulsed-laser deposition.The X-ray diffraction indicates that the film was successfully grown with high quality and single cubic spinel phase.The Raman-active phonons were studied by Raman spectroscopy.Using spectroscopic ellipsometry,we also determined the refractive index and extinction coefficient of the film in visible-near-infrared region.Band structure and density of states (DOS) of LiTi2O4 were carried out by first-principles calculations.The theoretical calculations are consistent with the experimental results,and the optical constants is well identified by the theoretical band structure.
    • 张玉苹
    • 摘要: 在研究生的椭偏光谱实验课中,本文站在学生的角度精心设计教学内容,采用理论结合实际的讲授方式,从仪器的注意事项、操作步骤、数据处理三方面深入讨论,使研究生更好地利用椭偏谱仪为科学研究提供有力的数据支持,并掌握一项科研仪器的使用技能.
    • 吴涛涛; 韦成华; 朱永祥; 周孟莲; 王立君
    • 摘要: 实验研究了大气环境下纯铁薄片样品在1 070 nm连续激光辐照下的耦合特性变化规律,并通过控制激光辐照时间获得了不同反射率和氧化状态的纯铁氧化层样品.利用椭偏光谱法研究了不同氧化状态纯铁氧化层在1 070 nm处的折射率和消光系数,基于椭偏反演结果和氧化层的微观形貌,提出了激光辐照下初期生成的α-Fe2 O3氧化层等效折射率随膜厚变化的分段表征,并进一步修正了计算金属氧化层激光反射率的多光束干涉模型.利用修正后的模型计算了纯铁在激光辐照过程中的反射率变化规律,与实验结果吻合较好.
    • 唐华杰; 张晋敏; 金浩; 邵飞; 胡维前; 谢泉
    • 摘要: 采用射频磁控溅射技术在Si(111)基片上制备金属锰膜,用椭圆偏振光谱在2.0~4.0 eV光子能量范围内研究了溅射压强对锰膜光学性质的影响.分别用德鲁得-洛伦兹模型以及有效介质模型对椭偏参数进行拟合,结果表明随压强增大薄膜致密度先增大后减少;折射率随压强增大先减少后增大;而消光系数随压强的变化与光子能量有关,在低能量区变化复杂,高能量区随压强增加与折射率规律一致.分析表明上述变化与薄膜的致密度密切相关.
    • 刘泉水; 韩先虎; 钱峰; 钟传杰
    • 摘要: 利用溶剂蒸汽辅助旋涂和辅助退火(SVA)工艺制备了PVP栅绝缘膜,并研究了SVA过程中溶剂蒸汽压对PVP膜特性的影响。根据椭偏光谱的柯西模型和有效介质近似(EMA)模型,对椭偏谱参数拟合分析得到了PVP膜光学参数与其微结构的关系。拟合结果表明,随着蒸汽压的增大,PVP膜总厚度(均小于30nm)和粗糙层厚度均降低,膜致密性得到改善。由这种膜构成的MIS结构的J-V特性测试结果显示,当蒸汽压由0.21增加至0.82时,在电场为5 MV/cm的条件下,其漏电流密度由1.04×10-6 A/cm2降至1.42×10-7 A/cm2。而且在蒸汽压为0.82时可得到膜厚仅约为20nm、单位面积电容达到145nF/cm2的超薄PVP膜。
    • 陈仁刚; 邓金祥; 陈亮; 孔乐; 崔敏; 高学飞; 庞天奇; 苗一鸣
    • 摘要: 在不同的衬底温度下,使用反应射频磁控溅射法,在玻璃衬底上制备了氮化锌薄膜样品.用X 射线衍射仪、原子力显微镜和椭偏仪对薄膜的晶体结构、表面形貌、光学性质进行了表征分析.薄膜的晶粒尺寸会随着衬底温度的升高先增大后减小,在200C时薄膜的结晶性最好.用椭偏仪测试样品,建立物理模型计算出氮化锌薄膜在430-850 nm范围内的折射率和消光系数等光学参数.利用Tauc公式计算出氮化锌薄膜的光学带隙在1.73-1.79 eV之间.%Zinc nitride (Zn3N2) thin films were deposited on glass substrates by reactive radio-frequency magnetron sputtering from a pure Zn target in nitrogen-argon ambient. X-ray diffraction analysis indicates that the films just after the deposition are polycrystalline with a preferred orientation of (400). With increasing substrate temperature, the grain size in zinc nitride film increases from 26.5 nm (100 C) to 33.6 nm (200 C), and then decreases to 17.8 nm (300 C). Atomic force microscopy reveals that the film surface morphology is dependent on the substrate temperature. With reflective spectroscopic ellipsometry, the ellipsometric parameters ψ and ∆ of Zn3N2 films are measured. Then, a new model for Zn3N2 films is built. With the Tauc-Lorentz dispersion formula, the ellipsometric data are fitted, and both the thickness and optical constants (refractive index and extinction coefficient) of the films are obtained at a wavelength of 430—850 nm. The optical band gap is calculated from the extinction coefficient by using the Tauc formula, and a direct band gap of 1.73—1.79 eV is obtained.
    • 刘华松; 刘杰; 王利栓; 姜玉刚; 冷健; 季一勤
    • 摘要: Subsurface damage (SSD) of optical material is a focal point of research in laser optical field. The existence of SSD of substrates would change the properties of thin film, and the influence of the surface damage in substrates is essential to ansider during the design, manufacture of high precision low loss laser antireflection coating. Physical properties of SSD were studied. And the physical thickness and refractive index gradient of SSD could be retrieved by the spectroscopic ellipsometry of substrate surface. Then the effect of them on reflection spectrum of antireflection coating was obtained by calculation. The depth of SSD affects the reflection spectrum periodically. At last, with depth and gradient of SSD taken into account, the design of laser antireflection coating was revised theoretically, and the numerical experiment shows that the design is possible to realize zero-reflection at 633 nm.%光学材料的亚表面损伤层( SSD )是激光光学领域内的研究热点之一。亚表面损伤层的存在将导致其表面薄膜特性发生变化,尤其是在高精度低损耗激光薄膜的设计与制造中亚表面损伤层必须给予考虑。文中研究了亚表面损伤层的物理特性,并借助于椭圆偏振仪测量基底表面的椭偏光谱,反演计算出SSD的物理厚度和折射率梯度。通过计算得到了亚表面的深度和梯度对激光减反膜反射率光谱的影响,证明了亚表面深度对反射率的影响具有周期效应。在考虑亚表面损伤层的深度和梯度存在的基础上,对激光减反膜的设计进行了理论修正,数值实验结果证明通过膜系的修正可以实现633 nm处的零反射。
    • 张琰; 黄志明; 侯云; 周炜; 褚君浩
    • 摘要: Thin thermistor films of Mn1.56 Co(0.96-x)Ni0.48CuxO4 with spinel structure were prepared on amorphous A12O3 substrate by chemical solution deposition method at a temperature of 750 °C in air, which is much lower than the traditional sintered temperature of 1100 °C. The X-ray diffraction indicates that with the increase copper content, the preferred direction of crystalline is different under the same growth condition, but these films keep spinel structure well with increased crystallinity. The calculation of the grain size for all films have been performed by using the Scherrer' s equation, and we found that the grain size increased with the increase of the content of Cu. Scanning electron microscope (SEM) analysis showed that their surfaces were smooth and dense, free from cracks. The values of characteristic temperature T0, activation energy E and NTC(Negative Temperature Coefficient) α(295K) for Mn1.56Co(0.96-x)Cux04 films were obtained from their electrical properties. The result revealed that a lower Cu component corresponded to a higher value of a. Increasing Cu constituent,α decreased from -4. 12% to -3. 29%. The extinction coefficients of this films were determined by spectroscopic ellipsometry(SE) and their extinction coefficient peaks were identified. Key words; X-ray diffraction; scanning electron microscope (SEM) characteristic temperature T0; activation energy E; spectroscopic ellipsometry(SE); extinction coefficient%用化学溶液沉积法,以Al2O3为衬底在750°C温度下制备了锰钴镍铜Mn1.56 Co(0.96_x) Ni0.48 CuxO4系列薄膜.制备温度低于传统烧结工艺需要的温度(1100°C).采用X射线衍射(XRD)对所制备材料的结晶性能进行测量.结果表明,在一定范围内随着铜组分的增加,材料的择优取向发生变化,结晶性能提高且保持立方尖晶石单相结构.根据Scherrer方程和XRD数据计算薄膜的晶粒尺寸,Cu含量的增加导致薄膜晶粒尺寸增大.扫描电镜(SEM)图验证了制备的薄膜材料均匀致密,无裂痕.测量材料的变温I-V特性,计算材料在295 K下负温度电阻系数α及其活化能和特征温度,当Cu含量低时材料的α值较大,随着Cu组分的增加,α由-4.12%下降到-3.29%.利用椭偏光谱仪(SE),拟合材料在近紫外-可见-近红外波段的消光系数,并初步指认消光系数峰.
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