Sandwiched Plasmonic Nanoparticle Lattices for White-Light Lasing

This talk describes how a plasmonic nanolaser architecture can be designed to produce white-light lasing. We constructed a laser device based on a mixed dye solution sandwiched between two aluminum nanoparticle (NP) square lattices of different periodicities. The cavity modes were determined by two band-edge modes in one NP lattice and one band-edge mode in the other NP lattice. From a single lattice, simultaneous red and blue lasing was achieved using a binary dye solution, and the relative intensities of the two colors depended on the volume ratio of the dyes. Incorporating three dyes into the sandwich structure and optimizing their mixing ratios enabled simultaneous blue, green, and red lasing for a white-light emission profile.