Polarization‐Enabled Steering of Surface Plasmons Using Crossed Reciprocal Nanoantennas

Directional control over optical near‐fields using plasmonic structure is highly desirable for the realization of photonic nanocircuitry. A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional launching and steering of surface plasmon polaritons (SPPs). In the past,...

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Bibliographic Details
Published in:Laser & photonics reviews 2020-08, Vol.14 (8), p.n/a
Main Authors: Tyagi, Dhruv, Chen, Tzu‐Yu, Huang, Chen‐Bin
Format: Article
Language:English
Subjects:
beam steering
Demultiplexing
Directional control
Linear polarization
Nanoantennas
optical nanocircuits
Optical polarization
Plasmonics
Plasmons
Polaritons
polarization‐selective control
Steering
surface plasmon polaritons
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Summary:Directional control over optical near‐fields using plasmonic structure is highly desirable for the realization of photonic nanocircuitry. A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional launching and steering of surface plasmon polaritons (SPPs). In the past, polarization‐controlled SPP steering has been limited to wavelength demultiplexing that severely limits the realization of multiple output SPP‐based circuits excited by a monochromatic source. Based on crossed Babinet‐inverted nanoantennas, steering of SPPs in the first quadrant with very high sensitivity to the linear polarization of the exciting source is numerically and experimentally demonstrated. The same device also functions as a power‐splitter under a particular optical polarization. The results of this study can open up a new avenue towards full coherent control of SPPs and should accelerate the pace for the realization of highly functioning next‐generation optical nanocircuits. A simple plasmonic nanostructure is designed to allow polarization‐sensitive directional steering of surface plasmon polaritons (SPPs). Based on crossed Babinet‐inverted nanoantennas, steering of SPPs in the full first quadrant with high sensitivity to the linear polarization of the monochromatic exciting source is numerically and experimentally demonstrated. The same device could also function as a polarization‐driven power‐splitter.
ISSN:1863-8880
1863-8899
DOI:10.1002/lpor.202000076