Zhang Xia, Wu Yi, Zhu Xiaoli, Feng Guoying
Opt Express. 2024 Nov 4;32(23):40386-40397. doi: 10.1364/OE.537920.
Currently, research on optical tweezers technology predominantly focuses on single-trap optical tweezers, which have a limited controllable range. Multi-trap optical tweezers effectively address these limitations. This paper proposes a method for developing a dual-trap optical tweezers system utilizing basic optical elements. Two optical traps are created by reflecting a laser beam off the front and rear surfaces of a beam splitter. The transition between single-trap and dual-trap configurations is facilitated by a lens group, which allows for the adjustment of the distance between the two traps. Furthermore, by incorporating a rotatable optical wedge into the optical path, the optical trap can be rotated along an annular orbit of any radius. This study includes simulations and analyses of the effects of lens spacing, refractive index, and tilt angle on the rotational range of optical traps. An optical trapping experimental system was constructed, and its feasibility was demonstrated using polystyrene particles as the target objects.
目前，光镊技术的研究主要集中在单阱光镊上，其可控范围有限。多阱光镊有效地解决了这些限制。本文提出了一种利用基本光学元件开发双阱光镊系统的方法。通过使激光束在分束器的前表面和后表面反射来创建两个光阱。一个透镜组有助于单阱和双阱配置之间的转换，该透镜组允许调整两个阱之间的距离。此外，通过在光路中加入一个可旋转的光学楔块，光阱可以沿着任何半径的环形轨道旋转。本研究包括对透镜间距、折射率和倾斜角度对光阱旋转范围影响的模拟和分析。构建了一个光阱实验系统，并以聚苯乙烯颗粒作为目标物体证明了其可行性。
