@article{21861c6fd2d84dd69d7add0e471603e5,
title = "Low-Threshold Bound State in the Continuum Lasers in Hybrid Lattice Resonance Metasurfaces",
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.",
keywords = "BIC lasers, Mie resonance, bound state in the continuum, lattice resonances, metasurfaces",
author = "Yang, {Jhen Hong} and Huang, {Zhen Ting} and Maksimov, {Dmitrii N.} and Pankin, {Pavel S.} and Timofeev, {Ivan V.} and Hong, {Kuo Bing} and Heng Li and Chen, {Jia Wei} and Hsu, {Chu Yuan} and Liu, {Yi Yun} and Lu, {Tien Chang} and Lin, {Tzy Rong} and Yang, {Chan Shan} and Chen, {Kuo Ping}",
note = "Funding Information: This study was supported by the Higher Education Sprout Project of the National Chiao Tung University and Ministry of Education, also supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University and Ministry of Education (MOE) as well as the Ministry of Science and Technology of Taiwan (MOST-107-2221-E-009-046-MY3, 107-2218-E-009-056, 108-2221-E-019-055-MY3, 108-2221-E-019-057-MY3, 108-2923-E-009-003-MY3, 109-2124-M-009-005, 109-2221-E-009-150, and 110-2218-E-A49-012-MBK). This research was also funded by the Russian Foundation for Basic Research (project no. 19-52-52006). The authors also thank Taiwan Semiconductor Research Institute (TSRI) and the Center for Micro/Nano Science and Technology (CMNST) for the supporting of sample fabrication. Funding Information: This study was supported by the Higher Education Sprout Project of the National Chiao Tung University and Ministry of Education, also supported by the Higher Education Sprout Project of the National Yang Ming Chiao Tung University and Ministry of Education (MOE) as well as the Ministry of Science and Technology of Taiwan (MOST‐107‐2221‐E‐009‐046‐MY3, 107‐2218‐E‐009‐056, 108‐2221‐E‐019‐055‐MY3, 108‐2221‐E‐019‐057‐MY3, 108‐2923‐E‐009‐003‐MY3, 109‐2124‐M‐009‐005, 109‐2221‐E‐009‐150, and 110‐2218‐E‐A49‐012‐MBK). This research was also funded by the Russian Foundation for Basic Research (project no. 19‐52‐52006). The authors also thank Taiwan Semiconductor Research Institute (TSRI) and the Center for Micro/Nano Science and Technology (CMNST) for the supporting of sample fabrication. Publisher Copyright: {\textcopyright} 2021 Wiley-VCH GmbH.",
year = "2021",
month = oct,
doi = "10.1002/lpor.202100118",
language = "English",
volume = "15",
journal = "Laser and Photonics Reviews",
issn = "1863-8880",
publisher = "Wiley-VCH Verlag",
number = "10",
}