title: Ultracompact low-threshold organic laser.
abstract: We report an ultracompact low-threshold laser with an Alq3:DCM host:guest molecular organic thin film gain layer. The device uses a photonic crystal nanobeam cavity which provides a high quality factor to mode volume (Q/V) ratio and increased spontaneous emission factor along with a small footprint. Lasing is observed with a threshold of 4.2 μJ/cm(2) when pumped by femtosecond pulses of λ = 400 nm wavelength light. We also model the dynamics of the laser and show good agreement with the experimental data. The inherent waveguide geometry of the structure enables easy on-chip integration with potential applications in biochemical sensing, inertial sensors, and data communication.
authors.affiliation: Massachusetts Institute of Technology , 77 Massachusetts Avenue, Cambridge, Massachusetts 02139, United States.
authors.forename: Parag B
authors.initials: PB
authors.lastname: Deotare
authors.forename: Thomas S
authors.initials: TS
authors.lastname: Mahony
authors.forename: Vladimir
authors.initials: V
authors.lastname: Bulović
mesh_terms: D003460:Crystallization; D007834:Lasers; D008855:Microscopy, Electron, Scanning; D036103:Nanotechnology; D017785:Photons
keywords: Alq3:DCM; nanobeam cavities; nanolasers; organic laser dye; photonic crystal