Graphene-induced lasing mode tailoring in GaN floating microring cavity GangYi Zhu, FeiFei Qin, Ru Wang, XiaoXuan Wang, JunFeng Lu, Ying Yang, ChunXiang Xu and YongJin Wang EPL, 136 4 (2021) 44001 Published online: 01 March 2022 DOI: 10.1209/0295-5075/ac2456