Evidence for braggoriton excitations in opal photonic crystals infiltrated with highly polarizable dyes

@article{Eradat2002EvidenceFB,
  title={Evidence for braggoriton excitations in opal photonic crystals infiltrated with highly polarizable dyes},
  author={Nayer Eradat and Andrey Y. Sivachenko and M. E. Raikh and Zeev Valy Vardeny and Anvar A. Zakhidov and R. H. Baughman NP Photonics and Az Tucson and University of Utah and Honeywell Int. Research and Technology Center},
  journal={Applied Physics Letters},
  year={2002},
  volume={80},
  pages={3491-3493}
}
We studied angle-dependent reflectivity spectra of opal photonic crystals infiltrated with cyanine dye aggregates, which are highly polarizable media with very large Rabi frequency. We show that, at resonance condition between the exciton-polariton of the dye aggregate and the Bragg gap, the Bragg stop band decomposes into two reflectivity bands with a semitransparent spectral range in between, that is due to propagation of braggoritons inside the gap. 
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