Erratum to: Characteristics of cavity polaritons in a CuBr microcavity Yuka Kanatani, Toshiki Kawase, Daegwi Kim and Masaaki Nakayama Eur. Phys. J. B, 86 2 (2013) 72 Published online: 25 February 2013 DOI: 10.1140/epjb/e2013-40050-3