Design of off-axis and co-axial achromatic bifocal metalens

Shuyuan Lv; Fei Meng; Wenfeng Luo; Yuchi Bai; Rong Wang

doi:10.1117/12.2651762

15 December 2022 Design of off-axis and co-axial achromatic bifocal metalens

Shuyuan Lv, Fei Meng, Wenfeng Luo, Yuchi Bai, Rong Wang

Proceedings Volume 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022); 124780Y (2022) https://doi.org/10.1117/12.2651762
Event: Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 2022, Xi'an, China

Abstract

Metamaterials are widely used as an artificial composite material in optical systems, however, almost all imaging systems suffer from chromatic aberrations due to their inherent dispersion. In this paper, we demonstrate the achromatic bifocal metalens based on phase change materials by tuning the crystalline fraction of Ge₂Sb₂Te₅ in a linear-phasegradient metasurface, which can realize off-axis and co-axial achromatic bifocal metalens in the continuous waveband from 9.5 to12μm. Simulation results show that average focusing efficiency of the off-axis metalens in the working band is about 28.96%, average focusing efficiency of the co-axial metalens is 50.2% with the full width at half-maximum is close to the diffraction limit. This design will play an important role in the field of fluorescence microscopy, which can achieve achromatic objective and eyepiece metalens with different focal lengths over a wide waveband.

Citation Download Citation

Shuyuan Lv, Fei Meng, Wenfeng Luo, Yuchi Bai, and Rong Wang "Design of off-axis and co-axial achromatic bifocal metalens", Proc. SPIE 12478, Thirteenth International Conference on Information Optics and Photonics (CIOP 2022), 124780Y (15 December 2022); https://doi.org/10.1117/12.2651762

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