Optical waveguides with an aqueous core and a low-index nanoporous cladding
Optical waveguides with an aqueous core and a low-index nanoporous cladding
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DOI：
10.1364/opex.12.006446
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发表时间：
2004-12-27
期刊：
影响因子：
3.8
通讯作者：
Gangopadhyay, S
中科院分区：
文献类型：
--
作者：
Risk, WP;Kim, HC;Gangopadhyay, S
我们报告测量平面光波导具有水的核心和低折射率纳米多孔介质包层。旋涂沉积的纳米多孔电介质的结果在一个薄的（类似于0.8 μ m）低折射率的熔凝石英基板上的包层，这产生泄漏的波导模式，然而，对于大多数微流体应用中所需的水层厚度，存在大量的低损耗模式。我们证明，这样的波导可以用于有效地收集和传输的荧光内产生的水核心，并显示，这些纳米多孔材料的使用提供了优于主要的替代品，特氟隆（R）AF。（C）2004年美国光学学会。
We report measurements on planar optical waveguides having an aqueous core and a low-index nanoporous dielectric cladding. Spin-on deposition of the nanoporous dielectric results in a thin (similar to 0.8 mum) low-index cladding layer on a higher-index fused silica substrate, which produces leaky waveguide modes; however, for the aqueous layer thickness needed in most microfluidic applications, a large number of low-loss modes exist. We demonstrate that such a waveguide can be used for efficient collection and transport of fluorescence generated within the aqueous core and show that the use of these nanoporous materials offers advantages over the principal alternative, Teflon(R) AF. (C) 2004 Optical Society of America.