Designing a broadband and linear polarization metasurface carpet cloak in the visible

TL;DR

This paper presents a novel metasurface design enabling broadband, linear polarization carpet cloaking in the visible spectrum, overcoming previous limitations of narrow bandwidths and discrete wavelengths.

Contribution

The authors propose and numerically demonstrate a new metasurface design for broadband carpet cloaking at visible wavelengths, a significant advancement over prior narrowband approaches.

Findings

Achieved broadband cloaking from 650 nm to 800 nm

Demonstrated linear polarization compatibility

Validated design through numerical simulations

Abstract

In the past few years, carpet cloaking attracted interests because of its feasibility at optical frequencies and potential in stealth technologies. Metasurfaces have been proposed as a method to engineer ultra-thin carpet cloaking surfaces due to their abilities to manipulate wavefronts, polarization, and phase at subwavelength scale. However, achieving broadband carpet cloaking with a significant bandwidth is one of the key remaining challenges for metasurface designs. To date, broadband carpet cloaking based on metasurfaces has not been achieved and cloaking is limited to discrete wavelengths. Here, we propose and numerically demonstrate a novel metasurface design for broadband carpet cloaking with linear polarization at visible wavelengths from 650 nm to 800 nm. Our proposed method is a promising approach for broadband structured interfaces.