共查询到18条相似文献,搜索用时 109 毫秒
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针对目前二元光学元件掩模制作工艺过程的诸多不足,对连续型平面衍射聚光透镜掩模的激光直写制作工艺进行了研究。基于基尔霍夫标量衍射理论,采用光线追迹法设计了连续型平面衍射聚光透镜掩模。采用激光直写技术,利用CLWS 300M/C极坐标激光直写设备、S1830光刻胶和MICROPOSIT 351显影液,进行了刻写实验。实验表明,激光能量、预烘烤温度、显影液浓度以及预曝光对掩模微结构的制作均有影响。最后制作了掩模。与二元光学元件掩模的制作工艺相比,该技术具有工艺简单、制作周期短且易于操作的优点。 相似文献
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激光直写邻近疗效应的校正 总被引:3,自引:0,他引:3
邻近效应是限制光刻系统分辨力的一个重要因素,它也限制了激光直写在亚微米和亚半微微米光刻中的应用,分析了激光直写邻近效应产生的原因,指出它和电子束直写及投影光刻的区别,提出了一种简便有效的邻近校正方法,实验表明,通过光学邻近校正(OPC),利用微米级激光直写系统,制作出0.6μm的实用光刻线条。 相似文献
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对具有高Q值的回音壁模式微腔进行调制来获得单向单模输出,对研究腔光力学和开发高质量的微激光具有重要意义.本文对利用飞秒激光直写加工的耦合回音壁模式微腔的研究进行了简要回顾,具体介绍了微腔结构设计、加工过程、激射和耦合机制研究等.利用飞秒激光直写加工的强大三维图案化能力,灵活地设计实现了具有集成功能的单个微腔和具有不同空间组合位置的多个耦合微腔.基于耦合微腔的微激光具有低阂值,同时显示出良好的单模特性和单向性.结合理论模拟可以证实,微腔与微腔/光栅之间的耦合,一方面支持游标效应和集成滤波两种选模方式,另一方面能够破坏微腔的旋转对称性从而获得单向输出,从而实现了对微腔输出的有效调控. 相似文献
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利用飞秒激光直写微纳加工平台, 对6H-SiC材料进行了突破衍射极限的微纳结构加工研究. 使用中心波长和脉宽分别为800 nm和130 fs的钛蓝宝石激光器和荧光倒置显微镜搭建了飞秒激光直写微纳加工平台, 研究了在不同的实验条件下对6H-SiC的光学加工情况, 采用扫描电子显微镜对加工结构进行表征. 通过分析不同的激光功率和不同的曝光时间等实验条件下加工的分辨率, 发现分辨率随着激光功率的减小而提高, 随扫描速度的增大而提高, 且能突破光学衍射极限. 最终获得125 nm的加工线宽, 并加工了加工线宽240 nm, 周期1.0 μm的线阵列. 研究结果为微机电系统(MEMS)的微器件设计开创了新的思路, 对发展MEMS器件具有重要意义.
关键词:
飞秒激光直写
超衍射加工
6H-SiC
微机电系统 相似文献
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In order to determine the projected coordinate origin in the cone-beam CT scanning system with respect to the Feldkamp-Davis-Kress(FDK)algorithm,we propose a simple yet feasible method to accurately measure the projected coordinate origin.This method was established on the basis of the theory that the projection of a spherical object in the cone-beam field is an ellipse.We first utilized image processing and the least square estimation method to get each major axis of the elliptical Digital Radiography(DR)projections of a group of spherical objects.Then we determined the intersection point of the group of major axis by solving an over-determined equation set that was composed by the major axis equations of all the elliptical projections.Based on the experimental results,this new method was proved to be easy to implement in practical scanning systems with high accuracy and anti-noise capability. 相似文献
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Yuri P. Kalmykov Bernard P. J. Mulligan Serguey V. Titov William T. Coffey 《Journal of statistical physics》2010,141(3):589-606
The time evolution equation for the probability density function of spin orientations in the phase space representation of
the polar and azimuthal angles is derived for the nonaxially symmetric problem of a quantum paramagnet subjected to a uniform
magnetic field of arbitrary direction. This is accomplished by first rotating the coordinate system into one in which the polar axis is collinear with
the field vector, then writing the reduced density matrix equation in the new coordinate system as an explicit inverse Wigner-Stratonovich
transformation so that the phase space master equation may be derived just as in the axially symmetric case [Yu.P. Kalmykov
et al., J. Stat. Phys. 131:969, 2008]. The properties of this equation, resembling the corresponding Fokker-Planck equation, are investigated. In particular,
in the large spin limit, S→∞, the master equation becomes the classical Fokker-Planck equation describing the magnetization dynamics of a classical
paramagnet in an arbitrarily directed uniform external field. 相似文献
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空间旋转多光轴系统光轴平行性影响系统指向精度且校准难度高、耗时。基于空间旋转多光轴系统光轴校准原理,获得了校准理论模型;结合实验研究,建立了高精度光轴校准方案;以机械回转轴为基准,粗调准和精调准结合,以调整传感器安装面为粗调,借助双光楔实现光学量级的精校准;先校正可见光光轴与机械回转轴的平行性,再保证激光光轴与机械回转轴的平行性,最终保证可见光光轴与激光光轴的平行性。试验结果表明,该校准方案精度高,指标优于0.1 mrad,可用于实际工程装调。 相似文献
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LONG Ao JIAO Tian-Shu CHANG Li CHANG Geng-Fu DANG Jian-Rong GUO Ke-Jun ZHANG Chang-Shuan WU Gui-Heng YU Wen-Jie ZHANG Guo-Bin WANG Wen-Ling 《中国物理C(英文版)》1987,11(3):419-425
HIRFL magnetic field measuring system was built in October, 1983. There are 94 Hall probes on a detecting arm. The positioning device, which mainly consists of a detecting arm, a rotating ring and a fixed ring, is of a polar coordinate type. For 16KG magnetic field, the measuring repeatability of the system is better than ±5×10-5, the measuring accuracy is about ±1×10-4. The measuring rate is about 188 data per minute. 相似文献