Journal
APPLIED SCIENCES-BASEL
Volume 11, Issue 22, Pages -Publisher
MDPI
DOI: 10.3390/app112210643
Keywords
surface plasmon polaritons; photon spin router; nondiffracting beam
Categories
Funding
- National Key Research and Development Program of China [2019YFB2203903]
- National Natural Science Foundations of China [62065006]
- Natural Science Foundation of Guangxi [2019GXNSFAA245024, 2020GXNSFBA159059]
- Science and Technology Project of Guangxi [AD19245064]
- Guangxi Key Laboratory Project of Optoelectronic Information Processing [GD20103]
- Guangxi Key Laboratory Project of Automatic Detection Technology and Instrument [YQ20103]
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This study presents a highly adjustable non-diffracting SPP-beam-based spin router with the ability to dynamically rotate the launch direction and demonstrate good broadband response capability through theoretical design and simulation.
The development of a photonic device based on a non-diffracting surface plasmon polariton (SPP) beam can effectively improve the anti-interference ability. Furthermore, an easily adjustable on-chip routing device is highly desirable and extremely important in practical optical communication applications. However, no non-diffracting SPP-beam-based spin routing devices with high tunability in multiple degrees of freedom have been reported. In this study, we theoretically designed a simple micro-nano structure to realize a highly adjustable non-diffracting SPP-beam-based spin router using Finite-Difference Time-Domain (FDTD) simulation. The simulation results show that the structure enables spin-controlled nondiffracting SPP-beam directional launching. The launching direction of the nondiffracting SPP beam can be dynamically rotated counterclockwise or clockwise by changing the incident angle. Hence, the routing SPP beam can be coupled to different output waveguides to provide dynamic tunability. Moreover, this device shows good broadband response ability. This work may motivate the design and fabrication of future practical photon routing devices.
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