Angularly-selective scattering by plasmonic arrays.

Angularly-selective scattering by plasmonic arrays. (a) Periodic arrangements of metal nanostructures offer high angular and spectral selectivity of light absorption and emission by coupling LSP modes to propagating waves with select k-vectors. (b) Multi-scale quasi-periodic or aperiodic arrays can yield broadband and omnidirectional response by providing multiple k-vectors in their reciprocal lattices for coupling to LSP modes. Figure 3 of "Plasmonic materials for energy: from physics to applications," Svetlana V. Boriskina, Hadi Ghasemi, Gang Chen, Materials Today, 10/2013; 16:379-390. DOI:10.1016/j.mattod.2013.09.003