TITLE

Properties of 4-dicyanomethylene-2-methyl-6-(p-dimethyl-aminostyryl)-4H-pyran-doped Alq layers as optically pumped lasers

AUTHOR(S)
Jakaboviˆ, J.; Lengyel, O.; Kováĉ, J.; Wong, T. C.; Lee, C. S.; Lee, S. T.
PUB. DATE
August 2003
SOURCE
Applied Physics Letters;8/18/2003, Vol. 83 Issue 7, p1295
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The optical properties of tris-(8-hydroxyquinoline) aluminum (Alq) doped with 4-dicyanomethylene-2-methyl-6-(p-dimethyl-aminostyryl)-4H-pyran (DCM) in solutions and in solid films were studied by measuring the steady-state excitation and spontaneous emission spectra. The emission peak in the solid films shifted from 628 to 659 nm as the doping concentration of DCM changed from 0.9% to 11%. The optically pumped waveguide lasers were fabricated by coevaporation of Alq films with 1.3 wt % DCM onto gallium arsenide (GaAs) substrates using silicon dioxide (SiO[sub 2]) and magnesium fluoride (MgF[sub 2]) as cladding layers. Both types of waveguide laser structures showed optical confinement and simulated emission at a threshold pumping energy near 1.4 μJ. The result suggests a thin MgF[sub 2] may be used as a confinement layer that has the advantage of preparation by low-temperature evaporation. © 2003 American Institute of Physics.
ACCESSION #
10543260

 

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