School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore.
Nat Commun. 2012 Jan 31;3:651. doi: 10.1038/ncomms1662.
Transformation optics represents a new paradigm for designing light-manipulating devices, such as cloaks and field concentrators, through the engineering of electromagnetic space using materials with spatially variable parameters. Here we analyse liquid flowing in an optofluidic waveguide as a new type of controllable transformation optics medium. We show that a laminar liquid flow in an optofluidic channel exhibits spatially variable dielectric properties that support novel wave-focussing and interference phenomena, which are distinctively different from the discrete diffraction observed in solid waveguide arrays. Our work provides new insight into the unique optical properties of optofluidic waveguides and their potential applications.
变换光学代表了一种通过使用具有空间变化参数的材料来设计光操纵设备（如斗篷和场集中器）的新范例。在这里，我们分析了作为一种新型可控变换光学介质的光流体波导中的液体流动。我们表明，光流体通道中的层流液体表现出空间变化的介电特性，支持新颖的波聚焦和干涉现象，这与固体波导阵列中观察到的离散衍射明显不同。我们的工作为光流体波导的独特光学性质及其潜在应用提供了新的见解。
