中国物理B ›› 2022, Vol. 31 ›› Issue (9): 94205-094205.doi: 10.1088/1674-1056/ac6802

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Single-mode lasing in a coupled twin circular-side-octagon microcavity

Ke Yang(杨珂)1,2, Yue-De Yang(杨跃德)1,2, Jin-Long Xiao(肖金龙)1,2,†, and Yong-Zhen Huang(黄永箴)1,2   

  1. 1 State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2022-03-05 修回日期:2022-04-14 接受日期:2022-04-19 出版日期:2022-08-19 发布日期:2022-08-19
  • 通讯作者: Jin-Long Xiao E-mail:jlxiao@semi.ac.cn
  • 基金资助:
    Project supported by the Strategic Priority Research Program, Chinese Academy of Sciences (Grant No. XDB43000000), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDJSSW-JSC002), and the National Natural Science Foundation of China (Grant Nos. 61874113, 61875188, and 61935018).

Single-mode lasing in a coupled twin circular-side-octagon microcavity

Ke Yang(杨珂)1,2, Yue-De Yang(杨跃德)1,2, Jin-Long Xiao(肖金龙)1,2,†, and Yong-Zhen Huang(黄永箴)1,2   

  1. 1 State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing 100083, China;
    2 Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2022-03-05 Revised:2022-04-14 Accepted:2022-04-19 Online:2022-08-19 Published:2022-08-19
  • Contact: Jin-Long Xiao E-mail:jlxiao@semi.ac.cn
  • Supported by:
    Project supported by the Strategic Priority Research Program, Chinese Academy of Sciences (Grant No. XDB43000000), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDJSSW-JSC002), and the National Natural Science Foundation of China (Grant Nos. 61874113, 61875188, and 61935018).

摘要: We demonstrate the curvature of coupled twin circular-side-octagon microcavity (TCOM) lasers as the degree of freedom to realize manipulation of mode quality ($Q$) factor and lasing characteristics. Numerical simulation results indicate that mode $Q$ factors varying from 10$^{4 }$ to 10$^{8}$, wavelength intervals of different transverse modes, and mode numbers for four-bounce modes can be manipulated for five different deformations. Global mode distributes throughout coupled microcavity with mode $Q$ factor around the order of 10$^{4 }$ or 10$^{5}$. Four-bounce modes lase with injection currents applied single microcavity. By pumping both microcavities simultaneously, single-mode lasing for global modes with side mode suppression ratios (SMSRs) of 30, 32, 32, 31, and 36 dB is achieved at the deformation of 0, 0.5, 1, 1.5, and 2 with four-bounce modes suppressed, respectively. Moreover, the linewidths less than 11 MHz for the single mode are obtained with the deformation of 2. The results show that the lasing modes can be efficiently manipulated considering variable curvature for TCOM lasers, which can promote practical applications of microcavity lasers.

关键词: semiconductor lasers, whispering-gallery mode, coupled microcavity

Abstract: We demonstrate the curvature of coupled twin circular-side-octagon microcavity (TCOM) lasers as the degree of freedom to realize manipulation of mode quality ($Q$) factor and lasing characteristics. Numerical simulation results indicate that mode $Q$ factors varying from 10$^{4 }$ to 10$^{8}$, wavelength intervals of different transverse modes, and mode numbers for four-bounce modes can be manipulated for five different deformations. Global mode distributes throughout coupled microcavity with mode $Q$ factor around the order of 10$^{4 }$ or 10$^{5}$. Four-bounce modes lase with injection currents applied single microcavity. By pumping both microcavities simultaneously, single-mode lasing for global modes with side mode suppression ratios (SMSRs) of 30, 32, 32, 31, and 36 dB is achieved at the deformation of 0, 0.5, 1, 1.5, and 2 with four-bounce modes suppressed, respectively. Moreover, the linewidths less than 11 MHz for the single mode are obtained with the deformation of 2. The results show that the lasing modes can be efficiently manipulated considering variable curvature for TCOM lasers, which can promote practical applications of microcavity lasers.

Key words: semiconductor lasers, whispering-gallery mode, coupled microcavity

中图分类号:  (Semiconductor lasers; laser diodes)

  • 42.55.Px
42.55.Sa (Microcavity and microdisk lasers) 78.20.Bh (Theory, models, and numerical simulation)