Recent Progress on Ultrathin Metalenses for Flat Optics

Seong-Won Moon; Yeseul Kim; Gwanho Yoon; Junsuk Rho

doi:10.1016/j.isci.2020.101877

Recent Progress on Ultrathin Metalenses for Flat Optics

iScience. 2020 Nov 30;23(12):101877. doi: 10.1016/j.isci.2020.101877. eCollection 2020 Dec 18.

Authors

Seong-Won Moon¹, Yeseul Kim¹, Gwanho Yoon¹, Junsuk Rho^{1

2}

Affiliations

¹ Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.
² Department of Chemical Engineering, Pohang University of Science and Technology, Pohang 37673, Republic of Korea.

Abstract

As technology advances, electrical devices such as smartphones have become more and more compact, leading to a demand for the continuous miniaturization of optical components. Metalenses, ultrathin flat optical elements composed of metasurfaces consisting of arrays of subwavelength optical antennas, provide a method of meeting those requirements. Moreover, metalenses have many other distinctive advantages including aberration correction, active tunability, and semi-transparency, compared to their conventional refractive and diffractive counterparts. Therefore, over the last decade, great effort has been focused on developing metalenses to investigate and broaden the capabilities of metalenses for integration into future applications. Here, we discuss recent progress on metalenses including their basic design principles and notable characteristics such as aberration correction, tunability, and multifunctionality.

Keywords: Metamaterials; Optical Imaging; Optical Materials; Optical Physics.

Publication types

Review