Low-Threshold Bound State in the Continuum Lasers in Hybrid Lattice Resonance Metasurfaces

Jhen Hong Yang, Zhen Ting Huang, Dmitrii N. Maksimov, Pavel S. Pankin, Ivan V. Timofeev, Kuo Bing Hong, Heng Li, Jia Wei Chen, Chu Yuan Hsu, Yi Yun Liu, Tien Chang Lu, Tzy Rong Lin, Chan Shan Yang, Kuo Ping Chen*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Bound states in the continuum (BICs) have attracted considerable research attention due to their infinite quality factor (Q-factor) and extremely localized fields, which drastically enhances light–matter interactions and yields high potential in topological photonics and quantum optics. In this study, the room temperature directional lasing normal to a BIC metasurface is demonstrated with hybrid surface lattice resonances. Compared to the plasmonic nanolasers, the BIC metasurface lasers possess directional radiation and a larger emission volume. The high Q-factor resonance of BIC metasurface overcomes the limitation of a large mode volume in achieving low-threshold lasing. In addition, a design rule is proposed to prevent the occurrence of wavelength shift when the Q-factor changes; thus, the lasing thresholds for different BIC metasurfaces can be compared. In this work, the high localization ability of BICs is used to achieve the low lasing threshold (1.25 nJ) at the room temperature. The “light in–light out” diagram of the aforementioned laser based on simulations and experiments exhibits a large spontaneous emission coupling factor (β = 0.9) and the S-curve. The device developed in this study can be used in various applications, such as quantum emitters, optical sensing, nonlinear optics, and topological states engineering.

Original languageEnglish
Article number2100118
JournalLaser and Photonics Reviews
Volume15
Issue number10
DOIs
Publication statusPublished - 2021 Oct

Keywords

  • BIC lasers
  • Mie resonance
  • bound state in the continuum
  • lattice resonances
  • metasurfaces

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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