Abstract

The beauty of metasurfaces lies on their capability for controlling the amplitude, phase, and polarization response with subwavelength resolution via spatially-varying nano-scatterers. With the incorporation of multiple elements or multiple resonances of nano-resonators into metasurfaces, these integrated-resonant units (IRUs) provide additional degree of freedom to manipulate the multispectral optical property of scattering light over a continuous and broad bandwidth, which is especially essential for eliminating the chromatic effect that requires smooth and linear phase dispersion. Here, we demonstrated three achromatic meta-lens based on IRUs designs to show constant focal length in the range of 400 to 650 nm. In addition, a broadband versatile polarization generator operating in 400 nm to 1300 nm was demonstrated by using multi-nanorod IRUs as building blocks. The working efficiency of multi-nanorod design is enhanced above 10 times in the near infrared range compared to the optimization case of single nanorod design, demonstrating the capability of IRUs in achieving high conversion efficiency over a broad wavelength range.

© 2018 The Author(s)

PDF Article
More Like This
Second Harmonic Generation in Geometric-Phase Resonant Dielectric Metasurfaces

Jonathan Bar-David and Uriel Levy
JW2A.98 CLEO: Applications and Technology (CLEO_AT) 2018

Independent phase modulation of two polarization states with reflection-type metasurface

Jangwoon Sung, Gun-Yeal Lee, Chulsoo Choi, and Byoungho Lee
JTu2A.15 Frontiers in Optics (FiO) 2018

Broadband Achromatic Metalenses

Yu Han Chen, Pin Chieh Wu, Shuming Wang, Ren Jie Lin, Jia-Wern Chen, Yi-Chieh Lai, Cheng Hung Chu, Bo Han Chen, Zhenlin Wang, Tao Li, Shining Zhu, and Din Ping Tsai
FF1F.3 CLEO: QELS_Fundamental Science (CLEO_QELS) 2018

References

You do not have subscription access to this journal. Citation lists with outbound citation links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription