Erratum to: Characteristics of cavity polaritons in a CuBr microcavityYuka Kanatani, Toshiki Kawase, Daegwi Kim and Masaaki NakayamaEur. Phys. J. B, 86 2 (2013) 72DOI: https://doi.org/10.1140/epjb/e2013-40050-3