共查询到18条相似文献,搜索用时 62 毫秒
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基于高斯聚焦激光束热效应的超分辨近场结构光盘存储(孔径型Super-RENS)中,应用光学特性导纳矩阵建立的盘片光传导模型,采用有限元分析软件FEMLAB对不同激光功率和脉宽下的Sb掩膜层的孔径形成情况进行数值仿真.结果表明,当一定脉宽的激光功率超过介质的阈值时,掩膜层将有超分辨孔径形成,且孔径大小随功率的增大而增大.理论分析与孔径型Super-RENS光盘样片在不同激光功率下进行写入的实验结果相符,说明光热效应可以较好地描述孔径型Super-RENS光盘掩膜层孔径形成的过程.
关键词:
光存储
孔径型
超分辨近场结构
光热效应 相似文献
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通过对光与物质相互作用产生的各种效应的研究可以获得物质的组分、结构、电学、力学、相互作用等信息,因此光学激发和探测技术成为现代科学研究的重要工具。然而衍射效应将光学探测的最小空间尺度约束在波长量级,这严重限制了光学对微观结构的探测。近年来基于扫描探针显微镜发展而来的近场光学显微镜利用光学天线对光场的局域和增强作用,将光学探测的分辨率推进到10 nm的尺度。文章将介绍目前一种主流的光学超分辨技术——散射式扫描近场光学显微镜及其在材料科学和生命科学方面的前沿研究进展。 相似文献
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近场拉曼光谱技术的发展 总被引:1,自引:0,他引:1
将近场光学技术与拉曼光谱相结合,发展出近场拉曼光谱术。综述了近场拉曼光谱探测技术的发展现状,讨论了近场拉曼光谱术的优点和纳米局域光谱分析能力。对两种常用的探测方法(常规近场光谱探测方法和近场增强拉曼光谱探测方法)进行了比较,并介绍了近场拉曼光谱技术在生物、化学、纳米材料等领域的一些应用。 相似文献
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A novel read-only super-resolution optical disc structure (substrate/mask layer/dielectric layer) is proposed in this paper. By using a Si thin film as the mask layer, the recording pits with a diameter 380nm and a depth 50nm are read out on the dynamic measuring equipment; the laser wavelength α is 632.8nm and the numerical aperture is 0.40. In the course of reproduction, the laser power is 5mW and the rotation velocity of the disc is 4m·s-1. The optimum thickness of the Si thin film is 18nm and the signal-to-noise ratio is 32dB. 相似文献
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A. S. Kadochkin 《Journal of Applied Spectroscopy》2007,74(4):552-560
We have solved the problem in which a thin metal wafer (probe) with a nanohole interacts with the flat surface of a metastructured
film consisting of metal nanoparticles in an external optical radiation field. Nanoparticles are considered as two-level atomic
systems. This interaction of the wafer-probe and the flat surface in the external optical radiation field gives rise to optical
near-field resonance, the frequency of which differs significantly from the natural frequencies of two-level atoms in the
medium and the probe. The fields inside and outside the probe and metastructured film are calculated in the near-field and
far-field zones. The maximum resolution, which is achievable in the suggested scheme of near-field optical microscopy, can
reach about 10 nm.
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Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 74, No. 4, pp. 499–506, July–August, 2007. 相似文献
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Dual mode near-field scanning optical microscopy for near-field imaging of surface plasmon polariton
In this paper, we theoretically and experimentally demonstrate that metal coated apertured probes are efficient near-field probes on surfaces with high reflectivity for the scattering as well as for the collection mode near-field scanning optical microscopy (NSOM). We show that a blunt apertured metal coated tip is very effective in suppressing image dipoles which affect strongly the signals scattered from frequently used sharp metal tips or gold nanoparticle attached probes. By using a simultaneous collection and scattering mode (dual mode) NSOM we measure the near-field images of surface plasmon polariton (SPP) launched from a slit. The collection mode measures propagating SPP along lateral distance in a long scan range with high signal-to-noise ratio, and the scattering mode measures the polarization resolved near-field of SPP. Comparisons of the measured data obtained in the dual mode enable to easily characterize SPP and to separate the measured near-field into the propagating SPP and the directly transmitted light. 相似文献