Plasmonic Nanoparticle Lattice Devices for White‐Light Lasing

A plasmonic nanolaser architecture that can produce white‐light emission is reported. A laser device is designed based on a mixed dye solution used as gain material sandwiched between two aluminum nanoparticle (NP) square lattices of different periodicities. The (±1, 0) and (±1, ±1) band‐edge surface lattice resonance (SLR) modes of one NP lattice and the (±1, 0) band‐edge mode of the other NP lattice function as nanocavity modes for red, blue, and green lasing respectively. From a single aluminum NP lattice, simultaneous red and blue lasing is realized from a binary dye solution, and the relative intensities of the two colors are controlled by the volume ratio of the dyes. Also, a laser device is constructed by sandwiching dye solutions between two Al NP lattices with different periodicities, which enables red–green and blue–green lasing. With a combination of three dyes as liquid gain, red, green, and blue lasing for a white‐light emission profile is realized. A plasmonic nanolaser architecture based on sandwiched aluminum nanoparticle lattices can produce white‐light lasing. The two nanoparticle lattices with appropriately designed periodicities support three different surface lattice resonances as cavity modes at blue, green, and red wavelengths. A liquid gain layer consisting of three different dyes can facilitate simultaneous blue, green, and red lasing with a white‐light emission profile.