标题： 可调谐软物质光流体波导由光组装而成 显示英文标题

标题： Tunable soft-matter optofluidic waveguides assembled by light

摘要： 开发表现出异常光学特性的人工材料是当前光子学研究的主要方向之一。 特别引人关注的是由外部刺激可重构的软物质系统，在从物理学到化学和生命科学的研究领域中起着重要作用。 在此，我们制备并研究了由通过长程光学力结合的波长尺寸介电粒子形成的非常规自组装胶体光波导（CW）。 我们展示了这些CW的鲁棒非线性光学特性，这些特性导致的光学转换特性与梯度折射率材料的特性非常相似，并且能够通过CW实现光传播的可逆全光调谐。 此外，我们表征了导致CW自组装的强光机械相互作用；特别是，我们报告了整个CW结构的自维持振荡，调节方式使得形成CW的激光束的波长无法通过。 观察到的CW机械运动与通过CW传输的光强之间的显著耦合可以为设计新型可由光重构的介观尺度光子器件奠定基础。 显示英文摘要

摘要： Development of artificial materials exhibiting unusual optical properties is one of the major strands of current photonics research. Of particular interest are soft-matter systems reconfigurable by external stimuli that play an important role in research fields ranging from physics to chemistry and life sciences. Here, we prepare and study unconventional self-assembled colloidal optical waveguides (CWs) created from wavelength-size dielectric particles held together by long-range optical forces. We demonstrate robust non-linear optical properties of these CWs that lead to optical transformation characteristics remarkably similar to those of gradient refractive index materials and enable reversible all-optical tuning of light propagation through the CW. Moreover, we characterize strong optomechanical interactions responsible for the CW self-assembly; in particular, we report self-sustained oscillations of the whole CW structure tuned so that the wavelength of the laser beams forming the CW is not allowed to propagate through. The observed significant coupling between the mechanical motion of the CW and the intensity of light transmitted through the CW can form a base for designing novel mesoscopic-scale photonic devices that are reconfigurable by light.