Abstract

Planar metalenses provide an effective way to break the diffraction barrier in the far field. Their physical mechanism and applications have been intensively studied in the past decade. These investigations on sub-diffraction-limited light modulations have only been applied to specified single immersion environments; however, changing immersion environments can severely degrade their focusing performance, limiting their application potential. In this work, we propose and experimentally demonstrate an environmentally robust immersion supercritical lens (SCL) that can work in various immersion environments. The design of such a lens is based on the vectorial Rayleigh–Sommerfeld diffraction theory combined with a multi-objective optimization algorithm. The sub-diffraction-limited focusing effect has been experimentally demonstrated in commonly used media, including air, water, and oil, with refractive indices of 1.0, 1.33, and 1.51, respectively. Moreover, such a lens can maintain its effective numerical aperture at a fixed value, bringing a unique advantage in that the lateral size of the focal spots exhibits a similar value of ${{317}}\;{{\pm}}\;{{7}}\;{\rm{nm}}$ in all three media. Our demonstration provides the feasibility of SCLs in various application scenarios with multi-immersion environments, such as bioimaging, light trapping, and optical storage.

© 2021 Optical Society of America

Full Article  |  PDF Article
More Like This
Supercritical lens array in a centimeter scale patterned with maskless UV lithography

Xufeng Zhu, Wei Fang, Jian Lei, Zhangyin Li, Fei Xie, Yaoyu Cao, Yaping Zhang, Fei Qin, and Xiangping Li
Opt. Lett. 45(7) 1798-1801 (2020)

Variable immersion microscopy with a high numerical aperture

Keita Ishida, Kanta Naruse, Yuta Mizouchi, Yoshihiro Ogawa, Michio Matsushita, Takeshi Shimi, Hiroshi Kimura, and Satoru Fujiyoshi
Opt. Lett. 46(4) 856-859 (2021)

Generation of pure longitudinal magnetization focal spot with a triplex metalens

Kun Zhao, Zhiyu Zhang, Haofeng Zang, Jing Du, Yonghua Lu, and Pei Wang
Opt. Lett. 46(8) 1896-1899 (2021)

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 OSA member, or as an authorized user of your institution.

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

Data Availability

All relevant data can be obtained from the corresponding author under reasonable request.

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Figures (5)

You do not have subscription access to this journal. Figure files are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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

Tables (1)

You do not have subscription access to this journal. Article tables are available to subscribers only. You may subscribe either as an OSA member, or as an authorized user of your institution.

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