Dynamic control of liquid-core/liquid-cladding optical waveguides
Dynamic control of liquid-core/liquid-cladding optical waveguides
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DOI：
10.1073/pnas.0404423101
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发表时间：
2004-08-24
影响因子：
11.1
通讯作者：
Whitesides, GM
中科院分区：
文献类型：
--
作者：
Wolfe, DB;Conroy, RS;Whitesides, GM
本报告描述了由液体核心和液体包层（liq/liq波导）组成的波导中的光操作。这些波导是动态的：它们的结构和功能依赖于核心和包层液体的连续层流。因为它们是动态的，它们可以以固态波导不可能的方式不断地重新配置和适应。液体被引入微流控网络的通道中，该微流控网络被设计成夹在包层流体的流动板之间的流动芯液中。在低和中等雷诺数下，流动是层流的，liq/liq界面是光学光滑的。通道固体壁上的小不规则现象不会传播到这些界面中，因此liq/liq波导由于散射而表现出较低的光学损耗。通过控制液体的流速和成分，可以调整这些光学系统的特性。
This report describes the manipulation of light in waveguides that comprise a liquid core and a liquid cladding (liq/liq waveguide). These waveguides are dynamic: Their structure and function depend on a continuous, laminar flow of the core and cladding liquids. Because they are dynamic, they can be reconfigured and adapted continuously in ways that are not possible with solid-state waveguides. The liquids are introduced into the channels of a microfluidic network designed to sandwich the flowing core liquid between flowing slabs of the cladding fluid. At low and moderate Reynolds numbers, flow is laminar, and the liq/liq interfaces are optically smooth. Small irregularities in the solid walls of the channels do not propagate into these interfaces, and liq/liq waveguides therefore exhibit low optical loss because of scattering. Manipulating the rate of flow and the composition of the liquids tunes the characteristics of these optical systems.