Confined photon modes with triangular symmetry in hexagonal microcavities in 2D photonic Crystals

Work supported by Ministry of Science and Education (MEC) of Spain (Refs. TEC2004- 03545, TEC2005-05781-C03-01, NAN2004-08843-C05-04, NAN2004-09109-C04-01), and contracts S-505/ESP/000200, UE NoEs SANDIE (NMP4-CT-2004-500101) and PHORE- MOST (IST-2-511616-NOE). The authors acknowledge useful discussions with Andreas H°akansson, Javier Martin and Daniel Torrent. Yu. A. K. acknowledges a support from MEC (Grant SAB2004-0166). A. R. A. thanks a FPU fellowship (Ref. AP2002-0474) and L. J. M. an I3P fellowship.