| 初级球差对径向偏振光轴向光阱力的影响 |
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| 引用本文： | 李东华,蒲继雄,王喜庆.初级球差对径向偏振光轴向光阱力的影响[J].激光与光电子学进展,2011(7). |
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| 作者姓名： | 李东华 蒲继雄 王喜庆 |
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| 作者单位： | 华侨大学电子科学与技术系;西南交通大学科学与技术学院; |
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| 基金项目： | 国家自然科学基金(60977068)资助课题 |
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| 摘 要： | 根据里查德沃耳夫矢量积分理论,研究了在径向偏振光经大数值孔径聚焦下,透镜球差对瑞利粒子轴向光阱力的影响。通过数值计算得到了轴向光阱力随球差系数变化的分布。研究结果表明,球差系数的存在,不仅改变了光阱力的数值大小,也影响了对粒子束缚的有效作用区域,还导致光阱中心位置发生偏移。而且正负球差系数对光阱力的影响并不总是对称的,正球差系数使得梯度力的0点位置往z轴正向偏移,负球差系数使得梯度力的0点位置往z轴负向偏移。在不同的数值孔径、粒子半径以及孔径与光腰的比值下,球差对光阱力的影响程度也不同。
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| 关 键 词： | 物理光学 光阱力 大数值孔径 球差 径向偏振光 |
Effect of Primary Spherical Aberration on Optical Trapping Force of Radially Polarized Beam |
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| Li Donghua Pu Jixiong Wang Xiqing Depart ment of Electronic Science & Technology,Huaqiao University,Quanzhou,Fujian ,China Depart ment of Physics,Science College,Southwest Jiaotong University,Chengdu,Sichuan ,China.Effect of Primary Spherical Aberration on Optical Trapping Force of Radially Polarized Beam[J].Laser & Optoelectronics Progress,2011(7). |
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| Authors: | Li Donghua Pu Jixiong Wang Xiqing Depart ment of Electronic Science & Technology Huaqiao University Quanzhou Fujian China Depart ment of Physics Science College Southwest Jiaotong University Chengdu Sichuan China |
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| Affiliation: | Li Donghua1 Pu Jixiong1 Wang Xiqing2 1Depart ment of Electronic Science & Technology,Huaqiao University,Quanzhou,Fujian 362021,China 2Depart ment of Physics,Science College,Southwest Jiaotong University,Chengdu,Sichuan 610031,China |
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| Abstract: | Based on Richards-Wolf vectorial diffraction method,we investigate the effect of primary spherical aberration on radiation forces of Rayleigh particles when a radially polarized beam is focused by a high numerical-aperture system.The distributions of radiation forces along axial direction varing with coefficient of spherical aberration are obtained through numerical calculations.The results show that when the primary spherical aberration is changed,influences reflect not only on the magnitude of the radiati... |
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| Keywords: | physical optics optical trapping force high numerical-aperture spherical aberration radially polarized beam |
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