Nanostructures for Enhanced Light Absorption in Solar Energy Devices

Figure 5

(a) Plasmonic particles scatter incoming coherent light into the underlying waveguide analogously with Figure 1(b). Due to stimulated emission of radiation from the particles into the waveguide, the guided light is coherent. Superposition of the incident light and the waveguided results in an amplitude modulated standing wave. Its time averaged intensity is here depicted as a sine curve. The plasmonic particles anneal (coalesce) at the time averaged intensity maxima of this modulated wave (blue particles) hereby forming the gratings. (b) Fringes formed at the intersection of the laser spot edge and the membrane edge. (c) Fringes formed on the laser spot edge. (d) Fringes formed on the membrane edge.