Abstract
We fabricated large-area films of colloidal photonic crystals (PC) from polystyrene (PS) beads and Rhodamine B (RB) dyes. The films contain ordered PC domains separated by cracks. The size of the domains and cracks can be controlled by the drying process. We found a pronounced stop-band for all ordered structures and estimated the Bragg attenuation length, LB, to be of the order of ∼2μm. We demonstrate that the photoluminescence (PL) emission spectra depend on the PC domain size and on the concentration of cracks and other defects. For a film with small density of cracks, we observed light channeling through cracks probably due to light inhibition.
Original language | English |
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Pages (from-to) | 643-647 |
Number of pages | 5 |
Journal | Synthetic Metals |
Volume | 139 |
Issue number | 3 |
DOIs | |
State | Published - 9 Oct 2003 |
Event | Proceedings of the Fifth International Topical Conference - Venice, Italy Duration: 9 Feb 2003 → 14 Feb 2003 |
Keywords
- Bragg diffraction
- Light channeling
- Nano-particles
- Photonic crystal
- Stop-band