Time delay in InGaN multiple quantum well laser diodes at room temperature * Ji Lian(季 莲) a) † , Jiang De-Sheng(江德生) a) , Zhang Shu-Ming(张书明) a) , Liu Zong-Shun(刘宗顺) a) , Zeng Chang(曾 畅) a) , Zhao De-Gang(赵德刚) a) , Zhu Jian-Jun(朱建军) a) , Wang Hui(王 辉) a) , Duan Li-Hong(段俐宏) a) , and Yang Hui(杨 辉) b)