title: A room-temperature semiconductor spaser operating near 1.5 μm.
abstract: Room temperature spasing of surface plasmon polaritons at 1.46 μm wavelength has been demonstrated by sandwiching a gold-film plasmonic waveguide between optically pumped InGaAs quantum-well gain media. The spaser exhibits gain narrowing, the expected transverse-magnetic polarization, and mirror feedback provided by cleaved facets in a 1-mm long cavity fabricated with a flip-chip approach. The 1.06-μm pump-threshold of ~60 kW/cm2 is in good agreement with calculations. The architecture is readily adaptable to all-electrical operation on an integrated microchip.
authors.affiliation: Optical Sciences Division, Naval Research Laboratory, Washington, DC 20375, USA.
authors.forename: R A
authors.initials: RA
authors.lastname: Flynn
authors.forename: C S
authors.initials: CS
authors.lastname: Kim
authors.forename: I
authors.initials: I
authors.lastname: Vurgaftman
authors.forename: M
authors.initials: M
authors.lastname: Kim
authors.forename: J R
authors.initials: JR
authors.lastname: Meyer
authors.forename: A J
authors.initials: AJ
authors.lastname: Mäkinen
authors.forename: K
authors.initials: K
authors.lastname: Bussmann
authors.forename: L
authors.initials: L
authors.lastname: Cheng
authors.forename: F-S
authors.initials: FS
authors.lastname: Choa
authors.forename: J P
authors.initials: JP
authors.lastname: Long
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D006046:Gold / Q000737:chemistry*; D007909:Lenses; D020349:Surface Plasmon Resonance / Q000379:methods*; D013696:Temperature
chemical_list: D006046:Gold