2013/10/09 by Qijing Lu, Fang-Jie Shu, Fangjie Shu +2 · 16 citations
Engineering · Physics and Astronomy · #Atomic physics #Cavity quantum electrodynamics #Coupling (piping) #Dielectric #Laser #Materials science #Mode volume #Nanophotonics #Optics #Optoelectronics #Photonic Crystals and Applications #Photonic and Optical Devices #Physics #Plasmonic and Surface Plasmon Research #Purcell effect #Q factor #Quantum #Quantum dot #Resonance (particle physics) #Resonator #Semiconductor #Spontaneous emission #Wavelength #physics.optics
paper · pdf · doi:10.1364/ol.38.005311
published in Optics Letters 38(24), 5311 (Optica Publishing Group) · 3 pages, 4 figures
arxiv created 2013/10/09 · openalex publication_date 2013/12/04 · arxiv updated 2014/07/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We propose a novel dielectric bow-tie (DBT) nanocavity consisting of two opposing tip-to-tip triangle semiconductor nanowires, whose end faces are coated by silver nanofilms. Based on the advantages of the dielectric slot and tip structures, and the high reflectivity of the silver mirror, light can be confined in this nanocavity with low loss. We demonstrate that at 4.5 K (300 K) around the resonance wavelength of 1550 nm, the mode excited in this nanocavity has a deep subwavelength mode volume of 2.8×10(-4) μm³ and a high quality factor of 4.9×10(4) (401.3), corresponding to an ultrahigh Purcell factor of 1.6×10(7) (1.36×10(5)). This DBT nanocavity may find applications for integrated nanophotonic circuits, such as high-efficiency single photon sources, thresholdless nanolasers, and strong coupling in cavity quantum electrodynamics experiments.