排序方式: 共有9条查询结果,搜索用时 15 毫秒
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提出利用同一波长的入射光在双面入射时两个能量之比的比值对光栅的参量进行测量,进一步提高准确度。首先从理论上比较正弦面形光栅在单一面入射及双面入射时各种衍射效率对光栅表面粗糙度的敏感程度;然后模拟测量出该正弦面型光栅在双面入射情况下的光栅参量;最后成功反演出体积相位全息光栅的三个参量,其测量结果为0.080μm,1.452μm,20.5μm准确度比单一入射面情况(0.080μm,1.451μm,20.1μm)时要高。同时该法继承了原来方法的无损伤、操作简便、可重复、易推广、成本低等优点。 相似文献
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利用RTCM算法研究一维光子晶体的缺陷模.研究了TE波和TM波入射时的情况,通过改变杂质层的光学厚度以及杂质层的折射率从而得出一些有重要指导意义的缺陷模特性.同时对有缺陷的一维光子晶体在窄带滤波器中的应用做了一定程度的探讨.结果表明:正入射时,TE波和TM波的透射率几乎相同,随着杂质层光学厚度的增加,透射峰数目增加,这有助于制作多道窄带滤波器.因此,有缺陷的一维光子晶体可以制作波分复用中的多道滤波器. 相似文献
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This paper presents the experimental progress of laser-focused Cr atomic deposition and the experimental condition.The result is an accurate array of lines with a periodicity of 212.8±0.2 nm and mean full-width at half maximum as approximately 95 nm.Surface growth in laser-focused Cr atomic deposition is modeled and studied by kinetic Monte Carlo simulation including two events:the one is that atom trajectories in laser standing wave are simulated with the semiclassical equations of motion to obtain the deposition position;the other is that adatom diffuses by considering two major diffusion processes,namely,terrace diffusion and step-edge descending.Comparing with experimental results(Anderson W R,Bradley C C,McClelland J J and Celotta R J 1999 Phys.Rev.A 59 2476),it finds that the simulated trend of dependence on feature width is in agreement with the power of standing wave,the other two simulated trends are the same in the initial stage.These results demonstrate that some surface diffusion processes play important role in feature width broadening.Numerical result also shows that high incoming beam flux of atoms deposited redounds to decrease the distance between adatoms which can diffuse to minimize the feature width and enhance the contrast. 相似文献
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用苯酐保护二乙烯三胺中伯氨基,仲氨基与氯乙酸甲酯作用后水解得到N,N-二(2-氨基乙撑基)甘氨酸,接着与五个硝基、三氯甲基氯苯作用得到题目化合物.测定了这些新化合物抑制烟草花叶病毒的活性,其中五个化合物的抑制百分率在52%~58%之间,但有两个化合物全无活性. 相似文献
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