论文标题
谐波光电位中的活性胶体
Active Colloids in Harmonic Optical Potentials
论文作者
论文摘要
我们使用实验，理论和数值模拟研究了光学陷阱中主动斑块胶体的运动。为了实现各向同性和谐波限制，我们的原型微粒具有几乎均匀的折射率指数，并验证，在没有活性的情况下，狭窄的运动与光学上均匀的布朗尼颗粒相同。如果通过垂直AC场打开活性，则仅用于强限制陷阱的玻尔兹曼样统计（高斯统计）（高斯统计）描述了密度分布，而较弱的电势会导致具有双峰形状的非高斯分布。我们的结果展示了一种在消除光学扭矩的光学潜在景观中研究主动软物质的简单方法。
We study the motion of active patchy colloids in an optical trap using experiments, theory and numerical simulations. To achieve isotropic and harmonic confinement, we prototype microparticles with a nearly uniform refractive index and verify that, in the absence of activity, the confined motion is identical to that of optically homogeneous Brownian particles. If the activity is turned on by means of vertical AC fields, the density distributions are described by Boltzmann-like statistics (Gaussian with effective temperature) only for strongly confining traps, whereas weaker potentials give rise to non-Gaussian distributions with a bimodal shape. Our results showcase a simple way to study active soft matter in optical potential landscapes eliminating the optical torque.
