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Proceedings Paper

Engineering the chromatic dispersion in dual-wavelength metalenses for unpolarized visible light
Author(s): Zi-Hang Huo; Xiao-Ning Pang; Hong Wang; Zhi-Bin Fan; Xiang-Yang Yu; Jian-Wen Dong; Shao-Ji Jiang
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Paper Abstract

Chromatic dispersion represents the wavelength-dependent behavior of optical devices and limits their operation bandwidth. Due to the material dispersion restriction of refractive elements, dispersion engineering remains a challenge to imaging technology and optical communication. Recently, metalens offers an attractive approach to engineer the dispersion by introducing the additional degree of freedom with only a single layer of nanostructures. Here, we propose a method to design the dual-wavelength metalenses with controllable dispersion characteristic in transmission mode in the visible region. Three kinds of polarization-independent metalenses are demonstrated, including those with zero dispersion, positive axial dispersion, and negative axial dispersion. All the metalenses show high resolution with nearly diffraction-limited focusing. Our findings may provide an alternative way to design dual-wavelength functional devices in the fields of optical information processing, imaging technologies and complex fluorescence techniques.

Paper Details

Date Published: 17 May 2019
PDF: 6 pages
Proc. SPIE 11170, 14th National Conference on Laser Technology and Optoelectronics (LTO 2019), 111702H (17 May 2019); doi: 10.1117/12.2533715
Show Author Affiliations
Zi-Hang Huo, Sun Yat-Sen Univ. (China)
Xiao-Ning Pang, Sun Yat-Sen Univ. (China)
Hong Wang, Sun Yat-Sen Univ. (China)
Zhi-Bin Fan, Sun Yat-Sen Univ. (China)
Xiang-Yang Yu, Sun Yat-Sen Univ. (China)
Jian-Wen Dong, Sun Yat-Sen Univ. (China)
Shao-Ji Jiang, Sun Yat-Sen Univ. (China)

Published in SPIE Proceedings Vol. 11170:
14th National Conference on Laser Technology and Optoelectronics (LTO 2019)
Jianqiang Zhu; Weibiao Chen; Zhenxi Zhang; Minlin Zhong; Pu Wang; Jianrong Qiu, Editor(s)

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