光学
物理
极化(电化学)
线极化
电场
光学(聚焦)
光圈(计算机存储器)
光轴
径向极化
梁(结构)
光束
椭圆极化
激光束
镜头(地质)
激光器
激光束质量
量子力学
物理化学
化学
声学
作者
Ralf Dorn,Susanne Quabis,Gerd Leuchs
标识
DOI:10.1103/physrevlett.91.233901
摘要
We experimentally demonstrate for the first time that a radially polarized field can be focused to a spot size significantly smaller [0.16(1)lambda(2)] than for linear polarization (0.26lambda(2)). The effect of the vector properties of light is shown by a comparison of the focal intensity distribution for radially and azimuthally polarized input fields. For strong focusing, a radially polarized field leads to a longitudinal electric field component at the focus which is sharp and centered at the optical axis. The relative contribution of this component is enhanced by using an annular aperture.
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