Low-threshold and controllable nanolaser based on quasi-BIC supported by an all-dielectric eccentric nanoring structure

• DOI: 10.1364/oe.420001
• Publication Date: 2021-03-31T14:00:09Z
• Authors: Weilin Bi; Xin Zhang; Meng Yan; Lina Zhao; Tingyin Ning; Yanyan Huo
• Keywords: Nanolaser; Nanoring

High- Q factor can enhance the interaction between light and matter, which is an important parameter to decrease threshold of nanolasers. Here, we theoretically propose eccentric nanoring structure with a high controllable realize low-threshold nanolaser by amplifying quasi-bound states in continuum (quasi-BIC). The designed nanostructure supports quasi-BIC because symmetry protection-breaking nanostructure. has very about 9.6×10 4 also be adjusted changing structural parameters. We use energy level diagram four-level two-electron system study lasing action structure. results show that relatively low 6.46 μJ/cm 2 . Furthermore, behavior tuned controlling parameters circular ring