检索规则说明:AND代表“并且”;OR代表“或者”;NOT代表“不包含”;(注意必须大写,运算符两边需空一格)
检 索 范 例 :范例一: (K=图书馆学 OR K=情报学) AND A=范并思 范例二:J=计算机应用与软件 AND (U=C++ OR U=Basic) NOT M=Visual
作 者:赵阳[1] 李德华[1] 周薇[1] 马建军[1] 姚香君[1] 田有良[1]
机构地区:[1]山东科技大学太赫兹研究中心,青岛市太赫兹技术重点实验室,山东青岛266510
出 处:《强激光与粒子束》2011年第8期2021-2025,共5页High Power Laser and Particle Beams
基 金:国家973计划项目;国家自然科学基金项目(61071016);青岛市科技计划项目(10-3-4-2-5-jch)
摘 要:根据瑞利-索末菲标量衍射理论分析了相位连续变化型波带片对高斯光束的衍射特性。在高斯光束入射下,对相位连续变化型波带片光轴和焦平面上的太赫兹强度分布特性进行了模拟,分析了入射光束的束腰半径和束腰位置对衍射场的影响,并与平面波入射的情况进行了对比。数值结果显示,相位连续变化型波带片可以实现对高斯分布太赫兹波的聚焦。相位连续变化型波带片的衍射规律与薄透镜的聚焦规律相似。通过合理调整束腰与波带片之间的距离可以保证衍射效率在85%以上。与平面波相比,高斯光束入射下的焦点处中心场强较小,但衍射效率较高。Diffractive properties of the continuous phase type zone plate with Gaussian beam incidence were analyzed based on Rayleigh-Sommerfeld diffraction theory. The simulations of intensity distribution on the focal plane and the optic axis were completed using Matlab. Diffraction fields of the zone plate with continuous phase were analyzed. The effects of the parameters of the incident beam on the diffraction field were discussed. The results indicate that the continuous phase type zone plate can focus Gaussian beam with high diffraction efficiency. Diffraction law of the continuous phase type zone plate is similar to that of thin lens. If the waist location is optimized, the diffraction efficiency will be larger than 85G. Compared with the plane wave inci- dence, when the Gaussian beam is incident, the center electric magnitude is smaller, but the diffraction efficiency is higher.
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在载入数据...
正在链接到云南高校图书馆文献保障联盟下载...
云南高校图书馆联盟文献共享服务平台 版权所有©
您的IP:3.141.18.167