Broadband Metasurface Carpet Cloak in the Near Infrared Region

The advent of metasurface gives a great push to the realization of extremely thin cloak. However, narrow bandwidth remains an unsolved problem. To solve this problem, we propose a broadband metasurface carpet cloak which can work well in the near-infrared band with circularly-polarized incidence. A novel phase compensation method is presented in this letter to show that a single metasurface can meet the phase requirements for cloaking in a broad spectrum. Through finite-difference time-domain simulations, we demonstrate that the cloak conceals a bump well in the broad spectrum from 1200 to 1680 nm.