Because of the demand for low-cost optical trapping small particles without directly touching in subwavelength volume, a liquid-core metal-cladding waveguide (LCMW) structure was put forward, and it retained all the merits of MCW, such as free space coupling, a large detection area, and polarization independence. LCMW was used for optical trapping of SiO₂ colloid particles. The reflectivity of the guiding layer was monitored to investigate the factors influencing the self-assembly speed of the SiO₂ particles (time for the reflectivity to reach a stable state). The results demonstrate that a smaller ultimate reflectivity of light, longer light-off time, or a higher sample refractive index increases the required optical trapping time for the SiO₂ colloid particles to reach a stable state.

针对亚波长体积内不直接接触的低成本光捕获小粒子的需求，提出了一种液芯金属包覆波导（LCMW）结构，它保留了MCW的所有优点，如自由空间耦合、检测面积大，偏振无关。LCMW用于SiO ₂胶体颗粒的光学俘获。监测引导层的反射率以研究影响SiO ₂粒子自组装速度的因素（反射率达到稳定状态的时间）。结果表明，较小的最终光反射率、较长的关断时间或较高的样品折射率会增加 SiO ₂所需的光学捕获时间 胶体颗粒达到稳定状态。