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Measuring phase and polarization singularities of light using spin-multiplexing metasurfaces
Yanan Fu1, Changjun Min, Jiahao Yu
1Nanophotonics Research Center, Shenzhen Key Laboratory of Micro-Scale Optical Information Technology, Shenzhen University, Shenzhen 518060, China. xcyuan@szu.edu.cn yqzhang@szu.edu.cn.
Nanoscale
|October 2, 2019
Summary
Researchers developed a novel spin-multiplexing metasurface for detecting phase and polarization singularities in light beams. This compact device accurately measures optical vortices and cylindrical vector beams, simplifying singular optics applications.
Area of Science:
- Optics and Photonics
- Metamaterials
- Singular Optics
Background:
- Light beams with phase/polarization singularities, like optical vortices (OVs) and cylindrical vector beams (CVBs), are crucial for OAM communications, particle manipulation, and super-resolved imaging.
- Existing methods for detecting these singularities are often bulky, complex, and limited in functionality.
Purpose of the Study:
- To propose and demonstrate a new, compact method for simultaneously detecting phase and polarization singularities in light beams.
- To overcome the limitations of traditional singularity detection techniques.
Main Methods:
- Utilized a spin-multiplexing metasurface for simultaneous detection of phase and polarization singularities.
- Performed numerical simulations and experimental validations.
Main Results:
- The metasurface accurately measures the topological charge of OVs and the polarization order of CVBs.
- The device demonstrated individual or simultaneous measurement capabilities.
- The metasurface exhibited a broadband response, compactness, and system simplification.
Conclusions:
- The proposed spin-multiplexing metasurface offers an effective and simplified approach for detecting optical singularities.
- This technology holds significant potential for singular optical beam shaping and high-capacity OAM/CVB multiplexing communications.
