Fig. 4. Spectra produced by using our approach as an optimization tool.

(A) Scattering at a narrow range close to a single wavelength. Here, we force the NN to find a total geometry that scatters around a single peak, using alternating layers of silver and silica. (B) Scattering across a broadband of wavelengths. The legend specifies the thickness of each shell in nanometers, alternating silica and silver shells. The network here was restricted to fewer layers of material (only five shells) but given a broader region of shell sizes than previously (from 10 to 70 nm).