fig2

Figure 2. Broadband absorption spectrum (A) of the BMA with an average absorptivity of 97.48% over 800-2,300 nm for vertically incident light, the inset shows a magnified view of these three prominent absorption peaks. Narrowband absorption spectrum (B) of the BMA presents a near perfect absorption peak, with an absorptivity of 99.23% and a FWHM of 23.14 nm. BMA: Bifunctional metamaterial absorber; FWHM: full width at half maximum.