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Chin. Phys. B, 2022, Vol. 31(9): 094205    DOI: 10.1088/1674-1056/ac6802
ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS Prev   Next  

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 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
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.
Keywords:  semiconductor lasers      whispering-gallery mode      coupled microcavity  
Received:  05 March 2022      Revised:  14 April 2022      Accepted manuscript online:  19 April 2022
PACS:  42.55.Px (Semiconductor lasers; laser diodes)  
  42.55.Sa (Microcavity and microdisk lasers)  
  78.20.Bh (Theory, models, and numerical simulation)  
Fund: 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).
Corresponding Authors:  Jin-Long Xiao     E-mail:  jlxiao@semi.ac.cn

Cite this article: 

Ke Yang(杨珂), Yue-De Yang(杨跃德), Jin-Long Xiao(肖金龙), and Yong-Zhen Huang(黄永箴) Single-mode lasing in a coupled twin circular-side-octagon microcavity 2022 Chin. Phys. B 31 094205

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