title: Photon-avalanche upconversion in thulium-doped lutetium aluminum garnet.
abstract: Strong blue fluorescence at 487 nm corresponding to the (1)G(4) --> (3)H(6) transition was generated from Tm(3+)-doped lutetium aluminum garnet on excitation with a 618-nm dye laser as a result of a photon-avalanche upconversion mechanism.
authors.affiliation: Department of Physics, Alabama A&M University, PO Box 1268, Normal, Alabama 35762, USA.
authors.forename: D N
authors.initials: DN
authors.lastname: Patel
authors.forename: B R
authors.initials: BR
authors.lastname: Reddy
authors.forename: S K
authors.initials: SK
authors.lastname: Nash-Stevenson