Si Substrate-Based Metamaterials for Ultrabroadband Perfect Absorption in Visible Regime

Figure 2

Absorption spectra of the quadrangular frustum pyramid array under normal incident light for various parameters. (a) Under the optimal conditions of  nm,  nm,  m, and  m. (b) For the different height , when  nm,  nm, and  m. (c) For the different thickness , when  nm,  nm,  m (d) For the different length , when  nm,  m, and  m. (e) For the different length , when  nm,  m, and  m. (f) Absorption spectra of the quadrangular frustum pyramid array with waveband from 200 nm to 1000 nm.

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