Abstract

An artificial subwavelength dielectric metalens (ML), the realization of being ultrathin and light-weight, provides a potential candidate with replacing a traditional bulky curved lens with a high image quality. A ML with 1.5 mm in diameter having numerical aperture (NA) $\sim{0.60}$ at the near-infrared wavelength of $\lambda = 0.94 \,\,{\unicode{x00B5}{\rm m}}$ was designed by the finite-difference time-domain (FDTD) method with speeding up optimization of the MLs’ scheme by the deep neural network (DNN) model. Additionally, an ultrathin high NA ML was achieved by cost effective semiconductor manufacturing technology. The fabricated ML can focus an incident light down to a spot as small as $ \sim{5.2}\,\,{\rm \unicode{x00B5}{\rm m}} $ with high optical efficiency of $\sim{88.4}\% $ (focusing efficiency achieved, 23.7%). We also provided an efficient MLs’ semiconductor manufacturing technology for the development of an optical device in near-infrared image technology.

© 2019 Optical Society of America

Full Article  |  PDF Article
OSA Recommended Articles
Sub-wavelength tight-focusing of terahertz waves by polarization-independent high-numerical-aperture dielectric metalens

Hao Chen, Zhixiang Wu, Zeyu Li, Zhenfei Luo, Xue Jiang, Zhongquan Wen, Liguo Zhu, Xun Zhou, Hua Li, Zhengguo Shang, Zhihai Zhang, Kun Zhang, Gaofeng Liang, Senlin Jiang, Lianghui Du, and Gang Chen
Opt. Express 26(23) 29817-29825 (2018)

High numerical aperture multifocal metalens based on Pancharatnam–Berry phase optical elements

Qinmiao Chen, Yan Li, Yanhua Han, Duo Deng, Dahai Yang, Ying Zhang, Yi Liu, and Jianmin Gao
Appl. Opt. 57(27) 7891-7894 (2018)

All-dielectric metalens for terahertz wave imaging

Xue Jiang, Hao Chen, Zeyu Li, Hongkuan Yuan, Luyao Cao, Zhenfei Luo, Kun Zhang, Zhihai Zhang, Zhongquan Wen, Li-guo Zhu, Xun Zhou, Gaofeng Liang, Desheng Ruan, Lianghui Du, Lingfang Wang, and Gang Chen
Opt. Express 26(11) 14132-14142 (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 OSA member, or as an authorized user of your institution.

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

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 (6)

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

Equations (1)

You do not have subscription access to this journal. Equations 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