13:30 〜 15:30 ▲ [20p-P4-2] Coupled-wave analysis for photonic-crystal surface-emitting lasers II– Optical loss in photonic crystals with external reflection – 〇(D)GELLETA JOHN1,2、KITAGAWA HITOSHI1,2、NODA SUSUMU1,2 (1.Kyoto Univ.、2.ACCEL JST)