Defocusing of a converging electromagnetic wave by a plane dielectric interface
Defocusing of a converging electromagnetic wave by a plane dielectric interface
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DOI：
10.1364/josaa.13.000320
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发表时间：
1996-02-01
影响因子：
1.9
通讯作者：
Visser, TD
中科院分区：
文献类型：
--
作者：
Wiersma, SH;Visser, TD
我们研究会聚的球面波如何被平面电介质界面扭曲。第二种媒质中的场是通过计算界面上的m理论绕射积分得到的。研究了光强的损失和光强分布的形式。给出了各种折射率对比度和焦深的例子。一般来说，与没有折射率对比度的情况相比，光强分布在较大的体积上。研究发现，将聚焦透镜向界面移动d距离并不会导致强度分布的相等移动。后一点具有重要的实际意义。(C)1996年美国光学学会
We study how a converging spherical wave gets distorted by a plane dielectric interface. The fields in the second medium are obtained by evaluating the m-theory diffraction integral on the interface. The loss of intensity and the form of the intensity distribution are investigated. Examples are presented for various refractive-index contrasts and depths of focus. In general the intensity gets spread out over a volume that is large compared with the case without refractive-index contrast. It was found that moving the focusing lens a distance d toward the interface does not result in an equal shift of the intensity profile. This latter point has important practical implications. (C) 1996 Optical Society of America