| Nonparaxial Dark-Hollow Gaussian Beams |
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| 作者姓名： | 高曾辉 吕百达 |
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| 作者单位： | [1]Institute of Optoelectronic Information, Yibin University, Yibin 644000 [2]Institute of Laser Physics and Chemistry, Sichuan University, Chengdu 610064 |
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| 基金项目： | Supported by the National Natural Science Foundation of China under Grant No 10574097. |
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| 摘 要： | The concept of nonparaxial dark-hollow Gaussian beams （DHGBs） is introduced. By using the Rayleigh-Sommerfeld diffraction integral, the analytical propagation equation of DHGBs in free space is derived. The on-axis intensity, far-field equation and, in particular, paraxial expressions are given and treated as special cases of our result. It is shown that the parameter f = 1/κω0 with κ being the wave number and ω0 being the waist width determines the nonparaxiality of DHGBs. However, the parameter range, within which the paraxial approach is valid, depends on the propagation distance. The beam order affects the beam profile and position of maximum on-axis intensity.
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| 关 键 词： | 高斯光束 非近轴性 Rayleigh-Sommerfeld衍射积分 解析传播方程 |
| 收稿时间： | 2005-09-20 |
| 修稿时间： | 2005-09-20 |
Nonparaxial Dark-Hollow Gaussian Beams |
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| GAO Zeng-Hui, LU Bai-Da.Nonparaxial Dark-Hollow Gaussian Beams[J].Chinese Physics Letters,2006,23(1):106-109. |
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| Authors: | GAO Zeng-Hui LU Bai-Da |
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