title: Continuous-wave ultraviolet laser action in strongly scattering Nd-doped alumina.
abstract: We report electrically pumped, cw laser action near 405 nm from Nd(3+) -doped delta -alumina nanopowders. To our knowledge, this is the first report of stimulated emission from the high-lying F(2) -excited states, achieved through feedback from strong elastic scattering of light over transport path lengths shorter than half a wavelength.
authors.forename: B
authors.initials: B
authors.lastname: Li
authors.forename: G
authors.initials: G
authors.lastname: Williams
authors.forename: S C
authors.initials: SC
authors.lastname: Rand
authors.forename: T
authors.initials: T
authors.lastname: Hinklin
authors.forename: R M
authors.initials: RM
authors.lastname: Laine