title: Plasmonic bowtie nanolaser arrays.
abstract: Plasmonic lasers exploit strong electromagnetic field confinement at dimensions well below the diffraction limit. However, lasing from an electromagnetic hot spot supported by discrete, coupled metal nanoparticles (NPs) has not been explicitly demonstrated to date. We present a new design for a room-temperature nanolaser based on three-dimensional (3D) Au bowtie NPs supported by an organic gain material. The extreme field compression, and thus ultrasmall mode volume, within the bowtie gaps produced laser oscillations at the localized plasmon resonance gap mode of the 3D bowties. Transient absorption measurements confirmed ultrafast resonant energy transfer between photoexcited dye molecules and gap plasmons on the picosecond time scale. These plasmonic nanolasers are anticipated to be readily integrated into Si-based photonic devices, all-optical circuits, and nanoscale biosensors.
authors.affiliation: Department of Chemistry, Northwestern University, Evanston, Illinois 60208, USA.
authors.forename: Jae Yong
authors.initials: JY
authors.lastname: Suh
authors.forename: Chul Hoon
authors.initials: CH
authors.lastname: Kim
authors.forename: Wei
authors.initials: W
authors.lastname: Zhou
authors.forename: Mark D
authors.initials: MD
authors.lastname: Huntington
authors.forename: Dick T
authors.initials: DT
authors.lastname: Co
authors.forename: Michael R
authors.initials: MR
authors.lastname: Wasielewski
authors.forename: Teri W
authors.initials: TW
authors.lastname: Odom
mesh_terms: D000042:Absorption; D015374:Biosensing Techniques; D004574:Electromagnetic Fields; D007700:Kinetics; D007834:Lasers; D008422:Materials Testing; D053768:Metal Nanoparticles / Q000737:chemistry; D008855:Microscopy, Electron, Scanning / Q000379:methods; D049329:Nanostructures / Q000737:chemistry; D036103:Nanotechnology / Q000379:methods; D012825:Silicon / Q000737:chemistry; D013055:Spectrophotometry, Infrared / Q000379:methods; D020349:Surface Plasmon Resonance; D013696:Temperature
chemical_list: D012825:Silicon