All-Optical Emission Control and Lasing in Plasmonic Lattices

• DOI: 10.1021/acsphotonics.0c01099
• Publication Date: 2020-10-09T07:33:56Z
• Authors: Jani M. Taskinen; Antti J. Moilanen; Heikki Rekola; Kim Kuntze; Arri Priimagi; Päivi Törmä; Tommi K. Hakala
• Keywords: Amplified spontaneous emission

We report on reversible all-optical emission control and lasing in plasmonic nanoparticle lattices. By incorporating photochromic molecules into the liquid gain medium composed of organic fluorescent molecules, we realize over absorption, two key parameters associated with both conventional nanoscale lasing. demonstrate photoswitching between distinct modes operation: (1) spontaneous to lattice mode, characterized by broad line width, low intensity, large angular distribution; (2) action, very narrow (sub-nm) widths due emergence increased temporal coherence system, approximately 3 orders magnitude increase 0.7° divergence beam. A rate-equation model is employed describe operation switchable laser. Our results provide first demonstration optically tunable losses lasers, which an important milestone for development active plasmonics paves way ultrafast switching nanolasers.