Optomechanical Wagon-Wheel Effects for Bidirectional Sorting of Dielectric Nanoparticles,Laser & Photonics Reviews

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Optomechanical Wagon-Wheel Effects for Bidirectional Sorting of Dielectric Nanoparticles
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-04-29 , DOI: 10.1002/lpor.202000546
Xiaohao Xu ₁ , Yi Yang ₁ , Lixiang Chen ₂ , Xixi Chen ₁ , Tianli Wu ₁ , Yuchao Li ₁ , Xiaoshuai Liu ₁ , Yao Zhang ₁ , Baojun Li ₁

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The visual perception of a moving target is not always true. Wheels turning rapidly, for instance, may look like rotating inversely. This phenomenon is known as the wagon-wheel effect (WWE) and it is caused by the undersampling of visual information. Here, an analogous manifestation of the WWE concept is described in the scenario of light–matter interactions, by showing that the dynamic response of a particle, to an optical trap scanned at different rates, can be diametrically opposed. Further, such behaviors are modulated by the particle dimensions, which can be exploited for particle size selection. The results uncover a distinct paradigm of nontrivial optical manipulation and expand the bidirectional optical sorting range of dielectric particles to the sub-200 nm scale.

中文翻译：

用于介电纳米颗粒双向分选的光机车轮效应

移动目标的视觉感知并不总是正确的。例如，快速转动的车轮可能看起来像反向旋转。这种现象被称为车轮效应 (WWE)，它是由视觉信息的欠采样引起的。在这里，在光-物质相互作用的场景中描述了 WWE 概念的类似表现，通过表明粒子对以不同速率扫描的光阱的动态响应可以截然相反。此外，这种行为受颗粒尺寸调节，可用于颗粒尺寸选择。结果揭示了非平凡光学操作的独特范例，并将介电粒子的双向光学分选范围扩展到亚 200 nm 尺度。

更新日期：2021-06-10

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