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 in the polymer film with high optical gain. Laser emission of the cavity was observed, which is located at with a full width at half maximum of above the lasing threshold of . The lasing output was observed at an unordinary angle owing to the superprism effect of opal photonic crystals.
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