• Photonics Research
  • Vol. 9, Issue 4, 432 (2021)
Shengnan Zhang1,2, Yufeng Li1,3,*, Peng Hu1,2, Zhenhuan Tian1,2..., Qiang Li1,2, Aixing Li1,2, Ye Zhang1,2 and Feng Yun2,4,*|Show fewer author(s)
Author Affiliations
  • 1Shaanxi Provincial Key Laboratory of Photonics & Information Technology, Xi’an Jiaotong University, Xi’an 710049, China
  • 2Solid-State Lighting Engineering Research Center, Xi’an Jiaotong University, Xi’an 710049, China
  • 3e-mail: yufengli@mail.xjtu.edu.cn
  • 4e-mail: fyun2010@mail.xjtu.edu.cn
  • show less
    DOI: 10.1364/PRJ.413796 Cite this Article Set citation alerts
    Shengnan Zhang, Yufeng Li, Peng Hu, Zhenhuan Tian, Qiang Li, Aixing Li, Ye Zhang, Feng Yun, "Realization of directional single-mode lasing by a GaN-based warped microring," Photonics Res. 9, 432 (2021) Copy Citation Text show less

    Abstract

    Multimode and random directionalities are major issues restricting the application of whispering gallery mode microcavity lasers. We demonstrated a 40 μm diameter microring with an off-centered embedded hole and warped geometry from strained III-nitride quantum well multilayers. Single-mode directional whispering gallery mode lasing was achieved by the warped structure and high-order mode suppression induced by the off-centered hole. In addition, the introduction of the off-centered hole reduced the lasing threshold from 3.24 to 2.79MW/cm2 compared with the warped microdisk without an embedded hole while maintaining a high-quality factor of more than 4000. Directional light emission in 3D was achieved and attributed to the warped structure, which provides a vertical component of the light emission, making it promising for building multifunctional coherent light sources in optoelectronic integration.
    RoC=16(t1+t2+t3)3ε1t1(t2+t3)+ε2(t1+t2)t3,

    View in Article

    Q=λ/Δλ,

    View in Article

    Shengnan Zhang, Yufeng Li, Peng Hu, Zhenhuan Tian, Qiang Li, Aixing Li, Ye Zhang, Feng Yun, "Realization of directional single-mode lasing by a GaN-based warped microring," Photonics Res. 9, 432 (2021)
    Download Citation