Global modes and coupled modes for integrated twin circular-side octagon microlasers

作     者：Ke YANG Yuede YANG Youzeng HAO Jiliang WU Yongtao HUANG Jiachen LIU Jinlong XIAO Yongzhen HUANG Ke YANG;Yuede YANG;Youzeng HAO;Jiliang WU;Yongtao HUANG;Jiachen LIU;Jinlong XIAO;Yongzhen HUANG

作者机构：State Key Laboratory of Integrated Optoelectronics Institute of Semiconductors Chinese Academy of Sciences Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of Sciences 

出 版 物：《Science China(Information Sciences)》 (中国科学:信息科学(英文版))

年 卷 期：2022年第65卷第2期

页      面：173-180页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0803[工学-光学工程] 

基　　金：supported by Strategic Priority Research Program, Chinese Academy of Sciences (Grant No. XDB43000000) Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDJ-SSW-JSC002) National Natural Science Foundation of China (Grant Nos. 61874113, 61875188, 61935018) 

主　　题：optical microcavity semiconductor lasers coupled cavity lasing mode control photonic integration 

摘      要：Whispering-gallery mode(WGM) microlasers are potential light sources for photonic integrated circuits and optical information processing. In this paper, an integrated twin circular-side octagon microlaser(TCOM) composed of two identical circular-side octagon microcavities(COMs) is proposed and demonstrated for realizing lasing mode control. In a TCOM, we found a global mode with the mode field of an 8 pattern(labeled 8 mode) in addition to weak coupling modes of traditional four-bounce modes. The 8 mode belongs to the whole coupled cavity and is insensitive to the refractive index offset of coupled COMs, but the weak coupling modes are strongly sensitive to the refractive index offset. Lasing mode transformation from multiple coupled modes to a single 8 mode is demonstrated by adjusting the refractive index offset through injection currents. Weak coupling modes for directly connected TCOMs and lasing mode control make the COM a potential unit for large-scale photonic integration and optical information processing.