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Broadband achromatic optical metasurface devices.
Shuming Wang1, Pin Chieh Wu2,3, Vin-Cent Su4
1National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, School of Physics, Nanjing University, Nanjing, 210093, China. wangshuming@nju.edu.cn.
Nature Communications
|August 5, 2017
Summary
Researchers developed achromatic metasurface devices to eliminate chromatic aberration. These novel devices enable broadband achromatic metalenses and gradient metasurfaces, paving the way for advanced optical applications.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Metasurfaces offer efficient light manipulation but suffer from chromatic aberration due to high phase dispersion.
- Chromatic aberration limits the functionality of metasurface-based optical devices.
Purpose of the Study:
- To propose and demonstrate a design principle for achromatic metasurface devices.
- To eliminate chromatic aberration over a broad, continuous wavelength range.
Main Methods:
- Design principle for achromatic metasurfaces.
- Demonstration of broadband achromatic metalenses and gradient metasurfaces in a reflection scheme.
- Characterization of device performance over the 1200-1680 nm wavelength region.
Main Results:
- Successfully eliminated chromatic aberration for circularly-polarized light from 1200 to 1680 nm.
- Achieved broadband achromatic metalenses with focusing efficiency around 12%.
- Implemented a broadband achromatic gradient metasurface for consistent light deflection across wavelengths.
Conclusions:
- The proposed design principle enables the creation of previously impossible flat achromatic optical devices.
- These achromatic metasurfaces will drive innovation in full-color detection and imaging systems.
- This work overcomes a significant limitation in metasurface applications.
