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

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Abstract

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.

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Acknowledgements

This work was 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), and National Natural Science Foundation of China (Grant Nos. 61874113, 61875188, 61935018).

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Authors and Affiliations

  1. State Key Laboratory of Integrated Optoelectronics, Institute of Semiconductors, Chinese Academy of Sciences, Beijing, 100083, China

    Ke Yang, Yuede Yang, Youzeng Hao, Jiliang Wu, Yongtao Huang, Jiachen Liu, Jinlong Xiao & Yongzhen Huang

  2. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China

    Ke Yang, Yuede Yang, Youzeng Hao, Jiliang Wu, Yongtao Huang, Jiachen Liu, Jinlong Xiao & Yongzhen Huang

Authors
  1. Ke Yang
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  2. Yuede Yang
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  3. Youzeng Hao
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  4. Jiliang Wu
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  5. Yongtao Huang
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  6. Jiachen Liu
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  7. Jinlong Xiao
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  8. Yongzhen Huang
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Correspondence to Jinlong Xiao.

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Yang, K., Yang, Y., Hao, Y. et al. Global modes and coupled modes for integrated twin circular-side octagon microlasers. Sci. China Inf. Sci. 65, 122403 (2022). https://doi.org/10.1007/s11432-020-3185-0

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  • DOI: https://doi.org/10.1007/s11432-020-3185-0

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