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Spectral and Angle-Resolved Magneto-Optical Characterization of Photonic Nanostructures
Published on: November 21, 2019
Surface plasmon induced polarization rotation and optical vorticity in a single mode waveguide
Optics Express
|June 24, 2009
Summary
This study demonstrates on-chip polarization mode rotation in dielectric waveguides using copper electrodes. This method achieves giant polarization rotation and optical vorticity for advanced photonic devices.
Area of Science:
- Photonics and Optical Engineering
- Materials Science
- Nanotechnology
Background:
- Controlling polarization states in single-mode dielectric waveguides is crucial for optical information processing and high-speed integrated photonic devices.
- Existing methods for polarization manipulation can be complex or limited in scalability.
Purpose of the Study:
- To develop an integrated on-chip method for significant polarization mode rotation in dielectric waveguides.
- To investigate the underlying mechanism of polarization rotation induced by metallic structures.
Main Methods:
- Fabrication of short copper electrodes in close proximity to a single-mode dielectric waveguide core.
- Experimental observation and analysis of polarization mode rotation under diagonal electrode placement.
- Theoretical investigation of directional coupling to surface plasmon modes and inter-plasmon coupling.
Main Results:
- Achieved a giant polarization mode rotation of 10^4 degrees/mm.
- Demonstrated polarization rotation using offset metallic electrodes placed diagonally along the waveguide.
- Identified directional coupling into guided surface plasmon modes and inter-plasmon coupling as the primary mechanism.
Conclusions:
- The proposed on-chip method effectively induces giant polarization rotation and optical vorticity (helical power flow) in dielectric waveguides.
- This technique offers a promising pathway for advanced optical information processing and integrated photonic device development.
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