Broadband visible achromatic metalenses enabled by cascaded group delay compensation (Conference Presentation)

Shengyuan Chang; Lidan Zhang; Yao Duan; Xingjie Ni

doi:10.1117/12.2633110

3 October 2022 Broadband visible achromatic metalenses enabled by cascaded group delay compensation (Conference Presentation)

Shengyuan Chang, Lidan Zhang, Yao Duan, Xingjie Ni

Author Affiliations +

Proceedings Volume PC12195, Metamaterials, Metadevices, and Metasystems 2022; PC121951N (2022) https://doi.org/10.1117/12.2633110
Event: SPIE Nanoscience + Engineering, 2022, San Diego, California, United States

Abstract

We theoretically and experimentally demonstrate a novel design of broadband double-layer achromatic metalens working for wavelengths ranging from 400-700 nm. By exploiting a dielectric staircase layer, we significantly extended the range of attainable group delay with a library of nanoantennas with moderate shape complexity. Our experiment results show that our metalens has a Strehl ratio of >80%, and the focal length variation is less than 3% over the entire visible band, exhibiting excellent broadband achromatic focusing. Our work could shed light on overcoming the size and bandwidth limits of achromatic metalenses and facilitate applications such as microscopy and spectral imaging.

Conference Presentation

Citation Download Citation

Shengyuan Chang, Lidan Zhang, Yao Duan, and Xingjie Ni "Broadband visible achromatic metalenses enabled by cascaded group delay compensation (Conference Presentation)", Proc. SPIE PC12195, Metamaterials, Metadevices, and Metasystems 2022, PC121951N (3 October 2022); https://doi.org/10.1117/12.2633110

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available