Qiu Peizhen, Lv Taiguo, Zhang Yupei, Yu Binbin, Lian Jiqing, Jing Ming, Zhang Dawei
Engineering Research Center of Optical Instrument and System, Ministry of Education and Shanghai Key Laboratory of Modern Optical System, University of Shanghai for Science and Technology, Shanghai 200093, China.
Department of Applied Physics, Huzhou University, Huzhou 313000, China.
Nanomaterials (Basel). 2018 Nov 26;8(12):975. doi: 10.3390/nano8120975.
Realizing multiple beam shaping functionalities in a single plasmonic device is crucial for photonic integration. Both plasmonic Bessel-like beams and bottle beams have potential applications in nanophotonics, particularly in plasmonic based circuits, near field optical trapping, and micro manipulation. Thus, it is very interesting to find new approaches for simultaneous generation of surface plasmon polariton Bessel-like beams and bottle beams in a single photonic device. Two types of polarization-dependent devices, which consist of arrays of spatially distributed sub-wavelength rectangular slits, are designed. The array of slits are specially arranged to construct an X-shaped or an IXI-shaped array, namely X-shaped device and IXI-shaped devices, respectively. Under illumination of circularly polarized light, plasmonic zero-order and first-order Bessel-like beams can be simultaneously generated on both sides of X-shaped devices. Plasmonic Bessel-like beam and bottle beam can be simultaneously generated on both sides of IXI-shaped devices. By changing the handedness of circularly polarized light, for both X-shaped and IXI-shaped devices, the positions of the generated plasmonic beams on either side of device can be dynamically interchanged.
在单个等离子体器件中实现多种光束整形功能对于光子集成至关重要。等离子体类贝塞尔光束和瓶形光束在纳米光子学中都有潜在应用，特别是在基于等离子体的电路、近场光学捕获和微操纵方面。因此，找到在单个光子器件中同时产生表面等离子体激元类贝塞尔光束和瓶形光束的新方法非常有趣。设计了两种类型的偏振相关器件，它们由空间分布的亚波长矩形狭缝阵列组成。狭缝阵列经过特殊排列以构建X形或IXI形阵列，分别称为X形器件和IXI形器件。在圆偏振光照射下，X形器件两侧可同时产生等离子体零阶和一阶类贝塞尔光束。IXI形器件两侧可同时产生等离子体类贝塞尔光束和瓶形光束。通过改变圆偏振光的旋向，对于X形和IXI形器件，在器件两侧产生的等离子体光束的位置都可以动态互换。
