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Nonlinear Diatomic Metasurface for Real and Fourier Space Image Encoding
Ningbin Mao1,2, Junhong Deng3, Xuecai Zhang1
1Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China.
Nano Letters
|September 9, 2020
Summary
Researchers developed a novel nonlinear plasmonic metasurface for advanced optical information encoding. This metasurface simultaneously encodes images in real and Fourier spaces, offering new possibilities for optical security applications.
Area of Science:
- Nonlinear optics
- Plasmonics
- Metasurfaces
Background:
- Metasurfaces excel at manipulating light in linear optics.
- Controlling light's degrees of freedom in nonlinear optics remains a challenge.
Purpose of the Study:
- To propose a nonlinear plasmonic metasurface capable of simultaneous real and Fourier space image encoding.
- To enable independent control over nonlinear optical properties.
Main Methods:
- Design of a diatomic meta-molecule for independent control of nonlinear geometric phase, polarization, and intensity.
- Operation in the near-infrared regime.
Main Results:
- Simultaneous encoding of optical images in both real and Fourier spaces.
- Demonstration of independent control over second harmonic wave properties.
Conclusions:
- The proposed nonlinear metasurface offers a compact platform for multidimensional optical information encoding.
- Potential applications in optical information security and anticounterfeiting.
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