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软X射线多层膜色散元件 总被引:1,自引:0,他引:1
介绍研制软X射线多层膜色散元件的初步结果,结合M0/S1、S/S1色散元件的研制实例,讨论了包括设计、性能模拟计算、镀膜工艺、检测等在内的制备过程,这些元件将在X射线光学和X射线光谱学的有关研究工作中得到应用。 相似文献
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用于惯性约束聚变诊断的软X射线探测元器件的能量响应曲线定标,利用北京同步辐射装置(BSRF-3B1束线,束流为20—80mA,光子能量为250—1000eV,通量约为1012photon/s·mm2·mr2·0.1%band width)及反射率计靶室,采用AXUV-100硅光二极管作源强绝对监测.对X射线二极管(XRD)及金刚石光电导探测器等五种探测元件进行能量响应曲线定标,获得初步实验结果,并对数据进行了分析
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软X射线光学和周期性多层膜 总被引:2,自引:1,他引:1
本文介绍了软X射线的基本性质,它们和可见光及X射线的性质有很大的差异.这些性质决定了软X射线光学元件的特殊性.过去发展的软X射线光学元件不够理想,影响了软X射线光学的发展.近十年来发展的由轻、重元素组成的周期性多层膜使局面大为改观.多层膜的结构研究有助于指明提高多层膜质量的方向. 相似文献
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圆斯托克斯向量和椭圆斯托克斯向量 总被引:1,自引:0,他引:1
随着选取不同的基态,斯托克斯向量应该分成线的、圆的和椭圆的斯托克斯向量三大类。本文对圆斯托克斯向量和椭圆斯托克斯向量作了定义,推导了各类斯托克斯向量相互间的换算公式,并讨论了偏振光学元件的各种穆勒矩阵以及相互间的关系。 相似文献
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在光学没计中,一般认为在同一光波面上,光束具有相同的振幅和偏振状态。事实上,光束经过许多光学元件后,偏振状态会发生变化,特别是入射角和光程的不同,会导致出射光波面上偏振分布不再均匀,形成偏振象差。本文主要就轴上物点发出的光束经过界面反射后的偏振象差方面进行了分析。 相似文献
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P. Xu Shining Zhu 《量子光学学报》2006,12(B08):85-85
An intense comb-shaped Raman spectra were obtained from a two-dimensional nonlinear x(2) photonic crystal - a hexagonally poled LiTaO3 crystal with lattice parameter 9 micros. The lowest Raman shift was down to 2 cm^-1 and the order of anti-stokes and stokes signals both achieved 11. The novel Raman spectra were mediated first by intense phonon-polariton fields, which were driven through the quasi-phase-matched coupling between the incident dual-beam both from an optical parametric oscillation laser, and further amplified greatly also by such quasi-phasematched nonlinear optical process. The dependence of the Raman spectra character on the wavelength and intensity of incident beams were studied in detail, which accordingly revealed information of the inelastic scattering and the elementary excitation in the nonlinear medium. These results on the other hand suggest technological importance for developing a novel Raman laser with the multi-wavelength output and a tunable frequency interval and for possible applications in quantum optics. 相似文献
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Stretched silver island multilayers have been investigated for patterned optical polarizers for the wavelength of 800 nm. Submicrometer-thick optical polarizing films are fabricated by stretching periodic multilayers consisting of silver island layers and Pyrex layers at the temperature of 660°C. As the optical anisotropy of the optical polarizing film is lost by heating at a temperature higher than the stretching temperature, the fine non-polarizing areas can be deliberately and easily formed on the optical polarizing film by laser irradiation with high power density. We have successfully formed various non-polarizing areas on the optical polarizing film with a 1 W-class carbon dioxide laser. The demonstrated fabricating techniques of deliberately patterned optical polarizing films should be useful for novel optical computing and sensing devices. 相似文献
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This paper describes new scheme for obtaining a differential signal to lock an optical cavity at a resonance peak. This scheme utilizes a unique property of non-planar cavities; due to an additional phase factor originated from the geometric configuration of the optical path, the two circular polarizations produce two resonance peaks. An ideal signal that crosses zero at the resonance peaks can be obtained using a simple setup consisting of a polarizing beam splitter and photo-diodes. The principle and the results of an experiment are also presented. 相似文献
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The electromagnetic field in subwavelength resonant diffractive optical elements is so concentrated that a very shallow surface corrugation obtained by wet chemical micro–nano-etching is sufficient to give rise to high contrast diffraction effects allowing a high wavelength-, polarization- or transverse-mode-selectivity which is not achievable by conventional diffractive elements. Two examples of polarizing laser mirrors at both extremes of the optical spectrum with wet-etched grating bypassing and cutting through the 1D photonic crystal are demonstrated. 相似文献
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偏光显微镜中偏振态的理论分析 总被引:2,自引:1,他引:1
为了更好地利用偏光显微镜检测光通过透明光学晶体材料后偏振态的变化,研究和鉴定晶体的光学特性,从介绍偏光显微镜的光学结构入手,分析了自然光通过偏光显微镜的几何光路,然后利用Stocks参量和Muller矩阵分析自然光通过偏光显微镜的偏振态变换,从理论上给出了出射光偏振态变化的原理,并利用计算机模拟了光强随各参数的变化曲线,分析了干涉图像形成的过程。对在实践中使用偏光显微镜测量晶体薄片的双折射率、延长符号、分析材料的光学特性以及观察材料的结构更具有指导性的意义。 相似文献
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ZHANG Gang YANG Ming CAO Zhuo-Liang 《理论物理通讯》2006,46(5):853-856
We propose two schemes to concentrate unknown nonmaximally tripartite GHZ entangled states via linear optical elements. The finial maximally entangled states obtained from our schemes are shared by two or three parties. Our schemes only need polarizing beam splitters and single-photon detectors. In addition, the schemes can be demonstrated within current experimental technology. 相似文献
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In this paper, we present a linear optical scheme for optimal
unambiguous discrimination among nonorthogonal quantum states in
terms of the multiple-rail and polarization representation of a
single photon. In our scheme, discriminated quantum states are
expressed by using the spatial degree of freedom of a single photon
while the polarization degree of freedom of the single photon is
used to act as an auxiliary qubit. The optical components used in
our scheme are only passive linear optical elements such as
polarizing beam splitters, wave plates, polarizers, single photon
detectors, and single photon source. 相似文献
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新型聚合物分散液晶相位光栅的制备 总被引:10,自引:5,他引:5
把具有光敏特性的预聚物与向列相液晶按一定比例混合 ,注入表面经过取向处理的液晶盒中。以紫外灯为光源 ,通过光掩膜法 ,使混合物在光场的引发下发生相分离 ,形成液晶 /聚合物相位光栅。由于相分离后液晶在取向膜的作用下沿液晶盒面方向旋转 180° ,克服了传统液晶光栅器件对入射光偏振方向的依赖 ,提高了光的有效利用率。采用光学显微镜和He Ne激光器进行测试 ,结果表明所制样品具有较好的栅结构 ,其衍射效率不受入射光偏振方向的影响且具有电场可调性。该光栅制作方法简便 ,驱动电压低 ,在光通信器件、衍射光学、投影显示、光开关等领域有广泛的应用前景 相似文献