Optical trapping and manipulation have been widely applied to biological systems, and their cutting-edge techniques are creating current trends in nanomaterial sciences. The resonant absorption of materials induces not only the energy transfer from photons to quantum mechanical motion of electrons but also the momentum transfer between them, resulting in dissipative optical forces that drive the macroscopic mechanical motion of the particles. However, optical manipulation, according to the quantum mechanical properties of individual nanoparticles, is still challenging. Here, we demonstrate selective transportation of nanodiamonds with and without nitrogen-vacancy centers by balancing resonant absorption and scattering forces induced by two different-colored lasers counterpropagating along a nanofiber. Furthermore, we propose a methodology for precisely determining the absorption cross sections for single nanoparticles by monitoring the optically driven motion, which is called as “optical force spectroscopy.” This method provides a novel direction in optical manipulation technology toward development of functional nanomaterials and quantum devices.

光学捕获和操纵已广泛应用于生物系统，其尖端技术正在创造纳米材料科学的当前趋势。材料的共振吸收不仅会引起从光子到电子的量子机械运动的能量转移，还会引起它们之间的动量转移，从而产生驱散光学力，从而驱使粒子发生宏观机械运动。然而，根据单个纳米颗粒的量子力学性质的光学操作仍具有挑战性。在这里，我们通过平衡由沿纳米纤维反向传播的两个不同颜色的激光引起的共振吸收和散射力，展示了具有和不具有氮空位中心的纳米金刚石的选择性运输。此外，我们提出了一种方法，该方法可通过监视光学驱动的运动来精确确定单个纳米颗粒的吸收截面，这被称为“光学力谱”。该方法为功能纳米材料和量子器件的开发提供了光学操纵技术的新方向。