Author Affiliations

G. Huyet,^1,* M. Giudiei,^1,♠ S. P. Hegarty,¹ J. G. MeInerney,¹ and S. Ballo^1,♣

¹Physics department, National University of Ireland, University College, Cork, Ireland, phone: + 1153 21 90 20 53. fax: + 353 21 27 69 49

^♠Institut Non Lineraire de Nice. 1305 Route des Lucioles. 06560 Valbonne, France

^♣Universitat de les Illes Balears-IMEDA, Palma de Mallorca, Spain

^*Corresponding author: huyet@peterhead.ucc.ie