Taming the Electromagnetic Boundaries via Metasurfaces: From Theory and Fabrication to Functional Devices

Table 1

Overview of the bandwidth limit for metasurface-based absorbers.

Journal and time	Thickness	λ (20 dB)	Ratio (limit: 0.163)
IEEE Trans. Antennas Propagat. 2011 [110]	14.5 mm	83.4 mm	0.174
Opt. Express, 2011 [245]	4.5 mm	25.7 mm	0.175
Opt. Lett., 2012 [114]	1.5 μm	8.72 μm	0.172
Opt. Express, 2012 [38]	0.3 nm		0
Appl. Phys. Lett., 2012 [102]	5 mm	13.86 mm	0.36
ACS Nano, 2014 [105]	0.86 μm	3.57 μm	0.24
Phys. Rev. Lett., 2013 [246]	40 mm	80.2 mm	0.498