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Detecting cylindrical vector beams with an on-chip plasmonic spin-Hall metalens
Optics Express
|April 27, 2022
Summary
This study introduces a novel on-chip plasmonic metalens for detecting cylindrical vector beams (CVBs). The device effectively distinguishes various polarization states and orders of CVBs, advancing microscale optical detection capabilities.
Area of Science:
- Optics and Photonics
- Plasmonics
- Nanotechnology
Background:
- Singular optical beams, such as optical vortex (OV) beams and cylindrical vector beams (CVBs), offer advanced functionalities due to their unique phase and polarization singularities.
- While microscale devices for OV detection are established, the detection of CVBs at the microscale remains a significant challenge.
- CVBs possess complex polarization states, requiring sophisticated methods for their characterization and manipulation.
Purpose of the Study:
- To propose and investigate a novel on-chip plasmonic spin-Hall metalens for the detection of cylindrical vector beams (CVBs).
- To demonstrate the capability of the designed metalens to detect different polarization orders and vectorial polarization states of CVBs.
- To explore the potential of this method for compact integrated optical communication and processing systems.
Main Methods:
- Design and theoretical modeling of an on-chip plasmonic spin-Hall metalens.
- Analytical investigation of the metalens' focal properties and splitting effects.
- Numerical simulations to validate the performance and detection capabilities of the metalens.
Main Results:
- The designed metalens successfully detects incident CVBs across different polarization orders.
- The metalens exhibits the ability to distinguish between radial, azimuthal, and other vectorial polarization states within the same order of CVBs.
- Both analytical models and numerical simulations confirm the focal position control and splitting effects of the metalens.
Conclusions:
- The proposed on-chip plasmonic spin-Hall metalens offers a viable solution for microscale CVB detection.
- This technology enables the differentiation of complex vectorial polarization states, a crucial step for advanced optical systems.
- The method holds significant promise for the development of compact and integrated optical communication and processing devices.
