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国家自然科学基金(61137002)

作品数:10 被引量:7H指数:2
相关作者:吴谊群姜来新逯鑫淼王阳赵艳丽更多>>
相关机构:黑龙江大学中国科学院上海光学精密机械研究所佳木斯大学更多>>
发文基金:国家自然科学基金国家重点基础研究发展计划黑龙江省卫生厅科研项目更多>>
相关领域:理学自动化与计算机技术电子电信一般工业技术更多>>

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10 条 记 录,以下是 1-10
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Phase-selective fluorescence of doped Ge_2Sb_2Te_5 phase-change memory thin films被引量:1
2015年
In this Letter, new concepts of fluorescence phase-change materials and fluorescence phase-change multilevel recording are proposed. High-contrast fluorescence between the amorphous and crystalline states is achieved in nickel- or bismuth-doped Ge;Sb;Te;phase-change memory thin films. Opposite phase-selective fluorescence effects are observed when different doping ions are used. The fluorescence intensity is sensitive to the crystallization degree of the films. This characteristic can be applied in reconfigurable multi-state memory and other logic devices. It also has likely applications in display and data visualization.
张科林金成王阳
关键词:FLUORESCENCEGERMANIUM
Progress of super-resolution near-field structure and application in optical data storage被引量:1
2014年
The era of big data has necessitated the use of ultra-high density optical storage devices. Super-resolution near-field structure (super-RENS), which has successfully surpassed the fundamental optical diffraction limit, is one of the promising next generation high-density optical storage technologies. This technology combines the traditional super-resolution optical disk with a near-field structure, and has the advantages of structural simplicity, strong practicability, and, more importantly, compatibility with the current optical storage pickup. The mask layer in super-RENS functions as the key to realizing superresolution. Development of suitable materials and stack designs has greatly been improved in the last decade. This paper described several types of super-RENS, such as aperture-type, light scattering center-type, bubble-type, and other types (e.g., WOx and ZnO), particularly the newly proposed super-RENS technology and research achievements. The paper also reviews the applications of super-RENS in high-density optical data storage in recent years. After analyzing and comparing various types of super-RENS technology, the paper proposes the aperturetype based on the mechanism of nonlinear optics as the most suitable candidate for practical applications in the near future.
Kui ZHANGYongyou GENGYang WANGYiqun WU
关键词:SUPER-RESOLUTIONNEAR-FIELD
近红外波段锑基铋掺杂薄膜厚度对光学常数与光学带隙的影响被引量:2
2012年
采用磁控溅射法制备了不同厚度的锑基铋掺杂薄膜,用X射线衍射(XRD)和透射电子显微镜(TEM)研究了薄膜结构随厚度的变化。利用椭圆偏振法测定了样品薄膜在近红外波段的光学常数与光学带隙,研究了膜厚对样品薄膜光学常数和光学带隙的影响。结果表明,膜厚从7nm增加至100nm时,其结构由非晶态转变为晶态。在950~2200nm波段,不同厚度薄膜样品的折射率在4.6~8.9范围,消光系数在0.6~5.8范围,光学带隙在0.32~0.16eV范围。随着膜厚的增加,薄膜的折射率和光学带隙减小,而消光系数升高;光学常数在膜厚50nm时存在临界值,其原因是临界值前后薄膜微观结构变化不同。
逯鑫淼姜来新吴谊群王阳
关键词:光学常数膜厚
Polarization readout analysis for multilevel phase change recording by crystallization degree modulation
2013年
Four different states of Si15Sb85 and Ge2Sb2Te5 phase change memory thin films are obtained by crystallization degree modulation through laser initialization at different powers or annealing at different temperatures. The polarization characteristics of these two four-level phase change recording media are analyzed systematically. A simple and effective readout scheme is then proposed, and the readout signal is numerically simulated. The results show that a high-contrast polarization readout can be obtained in an extensive wavelength range for the four-level phase change recording media using common phase change materials. This study will help in-depth understanding of the physical mechanisms and provide technical approaches to multilevel phase change recording.
林金成龙国云王阳吴谊群
Description and reconstruction of one-dimensional photonic crystal by digital signal processing theory
2014年
A method of describing one-dimensional photonic crystals (1DPCs) based on Z-domain digital signal processing theory is presented. The analytical expression of the target band gap spectrum in the digital domain is obtained by the autocorrelation of its impulse response. The feasibility of this method is verified by reconstructing two simple 1DPC structures with a target photonic band gap obtained by the traditional transfer matrix method. This method provides an effective approach to function-guided designs of interference-based band gap structures for photonic applications.
张娟付文鹏张荣军王阳
关键词:Z-TRANSFORM
False nonlinear effect in z-scan measurement based on semiconductor laser devices:theory and experiments被引量:1
2014年
With the development of semiconductor technology,semiconductor laser devices and semiconductor laser pump solid-state laser devices have been widely applied in z-scan experiments.However,the feedback light-induced output instability of semiconductor laser devices can negatively affect the accurate testing of the nonlinear index.In this work,the influence of feedback light on z-scan measurement is analyzed.Then the calculated formula of feedback light-induced false nonlinear z-scan curves is theoretically derived and experimentally verified.Two methods are proposed to reduce or eliminate the feedback light-induced false nonlinear effect.One is the addition of an attenuator to the z-scan optical path,and the other is the addition of an opto-isolator unit to the z-scan setup.The experimental and theoretical results indicate that the feedback light-induced false nonlinear effect is markedly reduced and can even be ignored if appropriate parameters are chosen.Thus,theoretical and experimental methods of eliminating the negative effect of feedback light on z-scan measurement are useful for accurately obtaining the nonlinear index of a sample.
Hui YanJingsong Wei
关键词:PUMPNONLINEAR
偶氮基噻唑衍生物的合成及非线性折射性质研究被引量:1
2015年
利用低温重氮化法分别合成了含单偶氮基的噻唑衍生物2-(5-二甲氨基苯酚)-偶氮基噻唑和含双偶氮基的噻唑衍生物2,5-二-(5-二甲氨基苯酚)-二偶氮基噻唑,采用元素分析、质谱、红外光谱(IR)、核磁共振氢谱(1H-NMR)等对化合物进行了表征,利用高斯03DFT//B3LYP/6-31G*对化合物的分子结构进行了优化,结果表明,单偶氮基的噻唑衍生物呈良好的平面结构,而双偶氮基的噻唑衍生物为扭曲的非平面结构,前者具有较高热稳定性。采用飞秒Z-扫描技术研究了化合物的非线性折射性质,结果显示,两个化合物非线性折射率均达到5×10-20m2·W-1以上,分子结构对化合物的非线性折射性质有重要影响。
冯艳茹贺春英赵艳丽陈志敏吴谊群
关键词:偶氮热稳定性
Image lithography in telluride suboxide thin film through controlling “virtual” bandgap被引量:1
2017年
In this work, TeO_(0.7)thin films were prepared by the reactive magnetron-controlling sputtering method. Complex gray-scale patterns were successfully fabricated on TeO_(0.7)thin films through the laser direct writing method.The structural origin of TeO_(0.7)thin film was investigated for gray-scale pattern formation. It is found that multiple gray-scale levels are dependent on the "virtual" bandgap energy of TeO_(0.7)thin films. The bandgap energy changes lead to refractive index and reflectivity difference. Thus, gray-scale tones can be formed. By accurately controlling laser energy, various "virtual" bandgaps can be generated in TeO_(0.7)thin films, and colorful gray-scale levels can be formed. Experimental results indicate that TeO_(0.7)thin film can be used as micro/nano image writing material.
Tao WeiJingsong WeiKui ZhangLong Zhang
关键词:VIRTUAL
In掩膜层超分辨光盘的读出研究
2012年
在超分辨光存储技术中,掩膜层材料是决定其性能优劣的关键。In薄膜可以作为掩膜层用来实现超分辨信息点的动态读出。采用直流磁控溅射法制备不同厚度的In薄膜,用台阶仪测量薄膜厚度随时间的变化关系,用原子力显微镜观察不同厚度薄膜样品的表面形貌。在预刻有尺寸为390nm信息点的光盘盘基上制备In薄膜,从而形成In掩膜超分辨光盘。利用光盘动态测试仪进行动态读出,最高读出载噪比(CNR)达到26dB。为了进一步分析超分辨动态读出的物理机理,采用变温椭圆偏振光谱仪测量In薄膜在不同温度下的光学常数,得到In薄膜在不同温度下的反射率和吸收系数。分析表明In掩膜超分辨光盘的读出机理符合孔径型超分辨读出模型。
张奎耿永友施宏仁
关键词:超分辨载噪比
Direct detection of the transient superresolution effect of nonlinear saturation absorption thin films被引量:2
2015年
Using a strong nonlinear saturation absorption effect is one technique for breaking through the diffraction limit. In this technique, formation of a dynamic and reversible optical pinhole channel and transient superresolution is critical. In this work, a pump–probe transient detection and observation–experimental setup is constructed to explore the formation process directly. A Ge2Sb2Te5 thin film with strong nonlinear saturation absorption is investigated. The dynamic evolution of the optical pinhole channel is detected and imaged, and the transient superresolution spot is directly captured experimentally. Results verify that the superresolution effect originates from the generation of an optical pinhole channel and that the formation of the optical pinhole channel is dynamic and reversible. A good method is provided for direct detection and observation of the transient process of the superresolution effect of nonlinear thin films.
Xinghao ZhangJingsong Wei
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