Photonic- Plasmonic Hybrid Microcavity with Ultra-High Quality Factor Regulated by Bowtie Plasmonic Nanoantenna

Ultra-high quality factor optical microcavities are key components for constructing various integrated photonic devices. Hybrid microcavities based on the photonic crystal microcavities provide a novel platform for realizing a strong light-matter interaction that possesses extensive application prospects in many fields, including cavity quantum electrodynamics, integrated single photon sources, and quantum computing. In this paper, we theoretically propose a novel photonic- plasmonic hybrid microcavity functioning in the visible light band based on the basic double heterostructure photonic crystal cavity with a gold bowtie plasmonic nanoantenna. Here, the structural parameters of the bowtie plasmonic nanostructures ( i. e., gap, angle, length, thickness, and relative position) were adjusted to investigate the regulation effects on the quality factor Q, effective mode volume V, and figure of merit Q/V of the cavity using a three-dimensional finite-difference time-domain method. The simulation results reveal that the effective mode volume and the figure of merit of the hybrid microcavity are stable on the order of 10(- 6) (lambda/ n)(3) and 10(8) (lambda/ n)(-3), respectively. Moreover, we achieved the highest Q/ V value of 5. 730689x10(8) (lambda/n)(-3), depicting a value much better than that of other microcavities.