Chiral nanophotonic waveguide interface based on spin-orbit interaction of light
Chiral nanophotonic waveguide interface based on spin-orbit interaction of light
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DOI：
10.1126/science.1257671
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发表时间：
2014-10-03
期刊：
影响因子：
56.9
通讯作者：
Rauschenbeutel, Arno
中科院分区：
文献类型：
--
作者：
Petersen, Jan;Volz, Juergen;Rauschenbeutel, Arno
利用纳米光子波导控制光流具有改变集成信息处理的潜力。由于被引导光子的强横向限制，它们的内禀自旋和轨道角动量发生耦合。利用光的这种自旋 - 轨道相互作用，我们打破了纳米光子波导表面上金纳米粒子对光散射的镜面对称性，并实现了一种手性波导耦合器，其中入射光的手性决定了在波导中的传播方向。我们控制散射过程的方向性，并能将多达94%的入射耦合光导向给定方向。我们的方法允许对光波导中的光进行控制和操纵以及光学传感器的新设计。
Controlling the flow of light with nanophotonic waveguides has the potential of transforming integrated information processing. Because of the strong transverse confinement of the guided photons, their internal spin and their orbital angular momentum get coupled. Using this spin-orbit interaction of light, we break the mirror symmetry of the scattering of light with a gold nanoparticle on the surface of a nanophotonic waveguide and realize a chiral waveguide coupler in which the handedness of the incident light determines the propagation direction in the waveguide. We control the directionality of the scattering process and can direct up to 94% of the incoupled light into a given direction. Our approach allows for the control and manipulation of light in optical waveguides and new designs of optical sensors.