Self-assembled colloidal photonic crystals: Light channels in cracks

O. Popov, V. Lirtsman, F. Kopnov, D. Davidov*, T. Saraidarov, R. Reisfeld

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

10 Scopus citations

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 languageEnglish
Pages (from-to)643-647
Number of pages5
JournalSynthetic Metals
Volume139
Issue number3
DOIs
StatePublished - 9 Oct 2003
EventProceedings of the Fifth International Topical Conference - Venice, Italy
Duration: 9 Feb 200314 Feb 2003

Keywords

  • Bragg diffraction
  • Light channeling
  • Nano-particles
  • Photonic crystal
  • Stop-band

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