title: Laser from Optically Pumped Quantum Dot CdSe/ZnS in a Colloidal Liquid.
abstract: In this study, we had investigated the amplified spontaneous emission (ASE) characteristics of CdSe/ZnS quantum dot (QDs) in a colloidal liquid. A third harmonic of Nd:YAG laser (355 nm) was used to produce laser-induced fluorescence (LIF) at 605 nm with a spectral width of 0 nm [full width at half maximum (FWHM)]. When the pump power and focusing were carefully optimized, an ASE at 610 nm with a spectral width of Δλ = 8 nm (FWHM) could be obtained. The beam was directional with a divergence of 10 milli radians (mrad); but the conversion efficiency was about 0.05%.
authors.forename: Saradh
authors.initials: S
authors.lastname: Prasad
authors.forename: K H
authors.initials: KH
authors.lastname: Ibnaouf
authors.forename: M S
authors.initials: MS
authors.lastname: AlSalhi
authors.forename: Kamal
authors.initials: K
authors.lastname: Alameh
authors.forename: D
authors.initials: D
authors.lastname: Devaraj
authors.forename: A
authors.initials: A
authors.lastname: Hamdan
authors.forename: M R
authors.initials: MR
authors.lastname: Karim
authors.forename: M B
authors.initials: MB
authors.lastname: Zaman
authors.forename: V
authors.initials: V
authors.lastname: Masilamani