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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Colloidal rods in optical potential energy landscapes
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Colloidal rods in optical potential energy landscapes

机译：胶体棒在光学势能景观中

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We study the static and dynamic behaviour of colloidal rods in an optical potential energy landscape. We explore the stable states of a colloidal rod in a single optical trap close to a flat wall. Here, two metastable states are observed, horizontal and vertical, both of which experience a parabolic potential energy landscape. Next we place a colloidal rod into a one-dimensional sinusoidal optical potential energy landscape and introduce a constant driving velocity. When driven below the critical velocity, the particle is confined to a single potential energy minimum of the optical landscape and the equilibrium position of a particle is investigated. The equilibrium position of a rod is found to vary substantially from that of a sphere, due to the drag coefficient of a rod being highly dependent on its proximity to an optical trap. The driving velocity is increased to enable the particle to traverse the periodic landscape and above the critical velocity, the average particle velocity increases as the square root of the driving velocity. When introducing oscillations to the driving velocity we observe dynamic mode locking and characterise the nature of synchronised motion of the rod-like particles.
机译：我们在光学势能景观胶体学习棒的静态和动态行为。我们探讨在一个单一的光阱接近平坦的壁的胶体杆的稳定状态。在这里，二亚稳状态观察，水平和垂直，这两者的经历抛物势能景观。接下来，我们将胶体杆成一维正弦光学势能景观和引入一个恒定速度驱动。当从动低于临界速度，粒子被限制在单一电势最小光学景观的能量，并研究了颗粒的平衡位置。杆的平衡位置是发现从该球体的显着变化，因的杆是高度依赖于它靠近一个光阱的阻力系数。驱动速度被增加，以使粒子穿过周期性景观和高于临界速度，平均颗粒速度随着驱动速度的平方根。当介绍振荡到驱动速度我们观察到动态模式锁定和表征棒状颗粒的同步运动的性质。

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