We report the first experimental study upon the optical trapping and manipulation of topological insulator (TI) particles. By virtue of the unique TI properties, which have a conducting surface and an insulating bulk, the particles present a peculiar behavior in the presence of a single laser beam optical tweezers: they oscillate in a plane perpendicular to the direction of the laser propagation. In other words, TI particles behave as optically induced oscillators, allowing dynamical measurements with unprecedented simplicity and purely optical control. Actually, optical rheology of soft matter interfaces and biological membranes, as well as dynamical force measurements in macromolecules and biopolymers, may be quoted as feasible possibilities for the near future.

中文翻译：

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作为光诱导振荡器的拓扑绝缘子粒子：朝着动态力测量和光学流变学。

我们报告有关光学陷阱和拓扑绝缘体（TI）粒子的操纵的第一个实验研究。凭借具有导电表面和绝缘块体的独特TI特性，在单个激光束光镊子的存在下，粒子表现出独特的行为：它们在垂直于激光传播方向的平面内振荡。换句话说，TI粒子的行为就像光感应振荡器一样，从而实现了前所未有的简单性和纯光学控制的动态测量。实际上，在不久的将来，可以引用软物质界面和生物膜的光学流变学，以及大分子和生物聚合物中的动力测量。