Laser emission from dye-doped polymer film in opal photonic crystal cavity

The authors demonstrated the lasing emission of the cavity constructed by the allyl derivative of fluorescein doped dendrimer/polymer film and two opal photonic crystals. A dendrimer encapsulated the structure modified laser dye and increased its concentration up to 5.3 wt % in the polymer film with high optical gain. Laser emission of the cavity was observed, which is located at 589 nm with a full width at half maximum of 1.7 nm above the lasing threshold of 15 mu J/pulse. The lasing output was observed at an unordinary angle owing to the superprism effect of opal photonic crystals. (c) 2006 American Institute of Physics.