Lee Moosung, Hanke Tobias, Launer Sara, Hong Sungkun
Institute for Functional Matter and Quantum Technologies, University of Stuttgart, 70569, Stuttgart, Germany.
Center for Integrated Quantum Science and Technology, University of Stuttgart, 70569, Stuttgart, Germany.
Sci Rep. 2025 Jun 3;15(1):19377. doi: 10.1038/s41598-025-04206-x.
Optically levitated dielectric nanoparticles have become valuable tools for precision sensing and quantum optomechanical experiments. To predict the dynamic properties of a particle trapped in an optical tweezer with high fidelity, a tool is needed to compute the particle's response to the given optical field accurately. Here, we utilise a numerical solution of the three-dimensional trapping light to accurately simulate optical tweezers and predict key optomechanical parameters. By controlling the numerical aperture and measuring the the particle's oscillation frequencies in the trap, we validate the accuracy of our method. We foresee broad applications of this method in the field of levitodynamics, where precise characterisation of optical tweezers is essential for estimating parameters ranging from motional frequencies to scattering responses of the particle with various dielectric properties.
光悬浮介电纳米粒子已成为精密传感和量子光机械实验的重要工具。为了高精度地预测捕获在光镊中的粒子的动态特性，需要一种工具来精确计算粒子对给定光场的响应。在这里，我们利用三维捕获光的数值解来精确模拟光镊并预测关键的光机械参数。通过控制数值孔径并测量粒子在陷阱中的振荡频率，我们验证了我们方法的准确性。我们预见该方法在悬浮动力学领域有广泛应用，在该领域中，精确表征光镊对于估计从运动频率到具有各种介电特性的粒子的散射响应等参数至关重要。
