在微腔中捕获粒子的光学可调表面
Optically tunable surfaces with trapped particles in microcavities
摘要：
我们介绍了基于金属金纳米粒子被困在开放的，充满水的金腔光学可调表面。表面的光学性质随着腔内颗粒的存在和位置而显著变化。粒子的精确位置被证明是可控的，通过外部照明施加的光学力，从而导致全光学可调谐性，从而通过外部施加的光调谐表面的光学响应。我们详细讨论了腔-粒子复合体的性能，为它作为一种新概念的大规模光调谐系统的应用提供了理论支持。
英文摘要：
We introduce optically tunable surfaces based upon metallic gold nanoparticles trapped in open, water-filled gold cavities. The optical properties of the surfaces change dramatically with the presence and location of the particles inside the cavities. The precise position of the particles is shown to be controllable through optical forces exerted by external illumination, thus leading to all-optical tunability, whereby the optical response of the surfaces is tuned through externally applied light. We discuss the performance of the cavity-particle complex in detail and provide theoretical support for its application as a novel concept of large-scale optically tunable system.
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