[14p-B415-1~15] 3.11 Photonic structures and phenomena

[14p-B415-14] Effect of the number of DBR layers on M² of photonic crystal lasers

〇Wataru Kunishi^1,2, Eiji Miyai^1,2, Menaka De Zoysa¹, Kenji Ishizaki¹, Masahiro Yoshida¹, Takuya Inoue¹, Ranko Hatsuda¹, Susumu Noda¹ (1.Kyoto Univ., 2.ROHM Co., Ltd.)

Keywords:photonic crystal, laser diode, surface emission

M² of nearly 1.2 is successfully obtained by only increasing the number of DBR layers from 14 pairs to 18 pairs in photonic crystal lasers. This is because that the increase of the number of DBR layers may have suppressed the influence that the light reflected ununiformly from the lower electrode through DBR layers could lower the beam quality.