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首页> 外文期刊>Applied optics >Absorption distribution of an optical beam focused into a turbid medium
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Absorption distribution of an optical beam focused into a turbid medium

机译：聚焦到混浊介质中的光束的吸收分布

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摘要

The focusing of light into a turbid medium was studied with Monte Carlo simulations. Focusing was found to have a significant effect on the absorption distribution in turbid media when the depth of the focal point (the distance between the focal point and the surface of the turbid media) was less than or comparable with the transport mean free path. Focusing could significantly increase the peak absorption and narrow the absorption distribution. As the depth of the focal point increased, the peak absorption decreased, and the depth of peak absorption increased initially but quickly reached a plateau that was less than the transport mean free path. A refractive-index-mismatched boundary between the ambient medium and the turbid medium deteriorated the focusing effect, increased the absorption near the boundary, lowered the peak absorption, and broadened the absorption distribution.
机译：使用蒙特卡洛模拟研究了将光聚焦到混浊的介质中。当焦点的深度（焦点与混浊介质表面之间的距离）小于或等于运输平均自由程时，发现聚焦对混浊介质中的吸收分布有显着影响。聚焦可显着增加峰吸收并缩小吸收分布。随着焦点深度的增加，峰吸收的深度减小，峰吸收的深度最初增加，但很快达到一个平稳的水平，该平稳水平小于传输平均自由程。周围介质和混浊介质之间的折射率不匹配边界会降低聚焦效果，增加边界附近的吸收，降低峰值吸收，并扩大吸收范围。

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