Optofluidic sensor using two-dimensional photonic crystal waveguides Faida Bougriou, Touraya Bouchemat, Mohamed Bouchemat and Nicole Paraire Eur. Phys. J. Appl. Phys., 62 1 (2013) 11201 Published online: 20 March 2013 DOI: 10.1051/epjap/2013110442