Inverse designed broadband all-dielectric electromagnetic metadevices

TL;DR

This paper introduces a novel all-dielectric metadevice platform that uses inverse design and additive manufacturing to create broadband, high-efficiency electromagnetic devices capable of polarization splitting, beam bending, and focusing.

Contribution

It presents a new inverse design approach combined with 3D printing to produce broadband, non-resonant dielectric metadevices, surpassing traditional narrowband resonant metasurfaces.

Findings

Achieved >60% transmission efficiency in all-dielectric metadevices.

Demonstrated polarization splitting, beam bending, and focusing at millimeter-wave frequencies.

Platform applicable across microwave to optical frequencies.

Abstract

We present an all-dielectric metadevice platform realized by combining an inverse electromagnetic design computational method with additive manufacturing. As opposed to conventional flat metasurface based devices that are composed of resonant building blocks resulting in narrow band operation, our design approach creates non-resonant, extremely broadband metadevices. We propose and demonstrate high-efficiency (transmission > 60%), using thin all-dielectric metadevices that are capable of polarization splitting, beam bending, and focusing. Experimental demonstrations are performed at millimeter-wave frequencies using 3D-printed metadevices, however our proposed platform can be readily applied to the design and fabrication of electromagnetic and photonic metadevices spanning microwave to optical frequencies.