Near-Field Light-Bending Photonic Switch: Physics of Switching Based on Three-Dimensional Poynting Vector Analysis

Photonic hook is a high-intensity, bent light focus with a proportional curvature to the wavelength of the incident light. Based on this unique light-bending phenomenon, a novel near-field photonic switch by means of a right-trapezoid dielectric Janus particle-lens embedded in the core of a planar w...

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Bibliographic Details
Published in:Photonics 2022-03, Vol.9 (3), p.154
Main Authors: Yue, Liyang, Wang, Zengbo, Yan, Bing, Xie, Yao, Geints, Yuri E., Minin, Oleg V., Minin, Igor V.
Format: Article
Language:English
Subjects:
3-D printers
Bending
Communication
Electric fields
Hooks
Incident light
Lasers
Light
Luminous intensity
Nanoparticles
Near fields
Optical communication
optical switch
photonic hook
Photonics
Physics
Planar waveguides
Poynting vector
Signal processing
Simulation
Switching
Three dimensional analysis
Vector analysis
vortex
Wave division multiplexing
Wavelength
Wavelengths
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Summary:Photonic hook is a high-intensity, bent light focus with a proportional curvature to the wavelength of the incident light. Based on this unique light-bending phenomenon, a novel near-field photonic switch by means of a right-trapezoid dielectric Janus particle-lens embedded in the core of a planar waveguide is proposed for switching the photonic signals at two common optical communication wavelengths, 1310 nm and 1550 nm, by using numerical simulations. The signals at these two wavelengths can be guided to different routes according to their oppositely bent photonic hooks to realise wavelength selective switching. The switching mechanism is analysed by an in-house developed three-dimensional (3D) Poynting vector visualisation technology. It demonstrates that the 3D distribution and number of Poynting vector vortexes produced by the particle highly affect the shapes and bending directions of the photonic hooks causing the near-field switching, and multiple independent high-magnitude areas matched by the regional Poynting vector streamlines can form these photonic hooks. The corresponding mechanism can only be represented by 3D Poynting vector distributions and is being reported for the first time.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9030154