Photonic band-gap effects upon the light emission from a dye-polymer-opal composite
Abstract
A polymeric photonic crystal formed by impregnating an opal with a Coumarin 6 dye containing polymer has been prepared and its emission properties studied by angular-resolved photoluminescence. A strong spectral redistribution of the luminescence intensity was observed in the dye-polymer-opal compared to that of the dye-polymer reference sample. The emission spectrum shows a marked distortion compared with the reference sample, which changes with the rotation of the crystal due to the angular dispersion of the stop band. Under increasing optical pumping power, a band of amplified spontaneous emission was observed at the stop-band edge. The angular dispersion of the stop band in the luminescence observed from the back surface exhibits in a strong directionality at the maximum of the dye emission band.
- Publication:
-
Applied Physics Letters
- Pub Date:
- August 1999
- DOI:
- 10.1063/1.124595
- Bibcode:
- 1999ApPhL..75.1057R
- Keywords:
-
- 42.70.Qs;
- 42.70.Jk;
- 78.55.-m;
- 42.50.Fx;
- Photonic bandgap materials;
- Polymers and organics;
- Photoluminescence properties and materials;
- Cooperative phenomena in quantum optical systems