Figure 5 | Scientific Reports

Figure 5

From: Experimental demonstration of broadband solar absorption beyond the lambertian limit in certain thin silicon photonic crystals

Figure 5

The (a) measured and (b) computed absorption spectra of the Teepee cell structure, having lattice constant a = 1,200 nm. Both structures are coated with a single layer ARC (60 nm), a back-side SiO2 buffer layer (75 nm) and Ag back-reflector. Both spectra agree with each other. Particularly, they both approach the Lambertian limit over λ ~ 550–1,000 nm region and exceeds the Lambertian limit over λ ~ 1,000–1,200 nm region. The predicted multiple resonant peaks at λ = 1,028 and 1,062 nm were also observed in the experiment (the red arrows).

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