Schedule 4 3:15 PM - 3:17 PM [LEDIA-P-31] Comparison of Al composition gradient p-AlGaN cladding layer for UV-B lasers *Yuya Ogino1, Kosuke Sato2, Shinji Yasue1, Shunya Tanaka1, Motoaki Iwaya1, Satoshi Kamiyama1, Tetsuya Takeuchi1, Isamu Akasaki1,3 (1. Meijo university , 2. Asahi Kasei, 3. Akasaki Reseach Center, Nagoya Univ)