Highly efficient optical coupling and transport phenomena in chains of dielectric microspheres
Highly efficient optical coupling and transport phenomena in chains of dielectric microspheres
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DOI：
10.1364/ol.31.000389
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发表时间：
2006-02-01
期刊：
影响因子：
3.6
通讯作者：
Backman, V
中科院分区：
文献类型：
--
作者：
Chen, ZG;Taflove, A;Backman, V
利用广义多粒子Mie理论，研究了光在介质微球链中的耦合和输运。我们确定了两个不同的耦合机制的光传输相邻微球之间的耦合效率，即倏逝波耦合和纳米喷射耦合。我们证明了完美的回音壁模式传播通过链的倏逝耦合微球可以实现。然而，由于光子纳米喷射的辐射性质，通过纳米喷射诱导微球链的光耦合和传输效率较低。理解这两种光学耦合机制对于选择合适的微球来构建耦合谐振器光波导和其他光子操纵器件以有效和低损耗地引导光子是至关重要的。(c)2006年美国光学学会。
Using the generalized multiparticle Mie theory, we investigate optical coupling and transport through chains of dielectric microspheres. We identify two distinct coupling mechanisms of optical transport in terms of the coupling efficiency between neighboring microspheres, namely, evanescent coupling and nanojet coupling. We demonstrate that perfect whispering gallery mode propagation through a chain of evanescently coupled microspheres can be achieved. However, optical coupling and transport through a chain of nanojet-inducing microspheres is less efficient due to the radiative nature of photonic nanojets. Understanding these two optical coupling mechanisms is critical for selecting appropriate microspheres to build coupled resonator optical waveguides and other photon-manipulation devices for effective and low-loss guiding of photons. (c) 2006 Optical Society of America.