Inverse-Designed Stretchable Metalens with Tunable Focal Distance
Abstract
In this paper we present an inverse-designed 3D-printed all-dielectric stretchable millimeter wave metalens with a tunable focal distance. Computational inverse-design method is used to design a flat metalens made of disconnected building polymer blocks with complex shapes, as opposed to conventional monolithic lenses. Proposed metalens provides better performance than a conventional Fresnel lens, using lesser amount of material and enabling larger focal distance tunability. The metalens is fabricated using a commercial 3D-printer and attached to a stretchable platform. Measurements and simulations show that focal distance can be tuned by a factor of 4 with a stretching factor of only 75%, a nearly diffraction-limited focal spot, and with a 70% focusing efficiency. The proposed platform can be extended for design and fabrication of multiple electromagnetic devices working from visible to microwave radiation depending on scaling of the devices.
Keywords
Cite
@article{arxiv.1712.05338,
title = {Inverse-Designed Stretchable Metalens with Tunable Focal Distance},
author = {Francois Callewaert and Vesselin Velev and Shizhou Jiang and Alan Varteres Sahakian and Prem Kumar and Koray Aydin},
journal= {arXiv preprint arXiv:1712.05338},
year = {2018}
}
Comments
11 pages, 4 figures