Key Laboratory of Advanced Micro-structure Materials, MOE, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
Center for Phononics and Thermal Energy Science, School of Physics Science and Engineering, Tongji University, Shanghai, 200092, China.
Sci Rep. 2017 Aug 10;7(1):7742. doi: 10.1038/s41598-017-08171-y.
The polarization controlled optical signal routing has many important applications in photonics such as polarization beam splitter. By using two-dimensional transmission lines with lumped elements, we experimentally demonstrate the selective excitation of guided modes in waveguides composed of two kinds of single-negative metamaterials. A localized, circularly polarized emitter placed near the interface of the two kinds of single-negative metamaterials only couples with one guided mode with a specific propagating direction determined by the polarization handedness of the source. Moreover, this optical spin-orbit locking phenomenon, also called the photonic spin Hall effect, is robust against interface fluctuations, which may be very useful in the manipulation of electromagnetic signals.
偏振控制光信号路由在光子学中有许多重要的应用，例如偏振分束器。通过使用具有集总元件的二维传输线，我们实验演示了由两种单负超材料组成的波导中导模的选择性激发。放置在两种单负超材料界面附近的局域、圆偏振发射器仅与具有特定传播方向的导模耦合，该传播方向由源的偏振手性决定。此外，这种光学自旋轨道锁定现象，也称为光子自旋霍尔效应，对界面波动具有鲁棒性，这在电磁信号的控制中可能非常有用。
