High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays

Authors

Shuyan Zhang
Myoung Hwan KimFollow
Francesco Aieta
Alan She
Tobias Mansuripur
Ilan Gabay
Mohammadreza Khorasaninejad
David Rousso
Xiaojun Wang
Mariano Troccoli
Nanfang Yu
Federico Capasso

Document Type

Article

Publication Date

8-8-2016

Abstract

We report the first demonstration of a mid-IR reflection-based flat lens with high efficiency and near diffraction-limited focusing. Focusing efficiency as high as 80%, in good agreement with simulations (83%), has been achieved at 45° incidence angle at λ = 4.6 μm. The off-axis geometry considerably simplifies the optical arrangement compared to the common geometry of normal incidence in reflection mode which requires beam splitters. Simulations show that the effects of incidence angle are small compared to parabolic mirrors with the same NA. The use of single-step photolithography allows large scale fabrication. Such a device is important in the development of compact telescopes, microscopes, and spectroscopic designs.

Comments

© Optics Express. Original version available at: http://doi.org/10.1364/OE.24.018024

Recommended Citation

Shuyan Zhang, et. al., (2016) High efficiency near diffraction-limited mid-infrared flat lenses based on metasurface reflectarrays.Optics Express24:1618024. DOI: http://doi.org/10.1364/OE.24.018024

First Page

18024

Last Page

18034

Publication Title

Optics Express

DOI

10.1364/OE.24.018024