2020/06/29 by Shaimaa I. Azzam, Krishnakali Chaudhuri, Azzam, Shaimaa I. +13 · 1 citation
Engineering · Physics and Astronomy · #FOS: Physical sciences #Mechanical and Optical Resonators #Optics (physics.optics) #Photonic and Optical Devices #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.2006.16473
openalex publication_date 2020/06/29 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The strong electric and magnetic resonances in dielectric subwavelength\nstructures have enabled unique opportunities for efficient manipulation of\nlight-matter interactions. Besides, the dramatic enhancement of nonlinear\nlight-matter interactions near so-called bound states in the continuum (BICs)\nhas recently attracted enormous attention due to potential advancements in\nall-optical and quantum computing. However, the experimental realizations and\nthe applications of high- Q factor resonances in dielectric resonances in the\nvisible regime have thus far been considerably limited. In this work, we\nexplore the interplay of electric and magnetic dipoles in arrays of dielectric\nnanoresonators to enhance light-matter interaction. We report on the\nexperimental realization of high-Q factor resonances in the visible through the\ncollective diffractive coupling of electric and magnetic dipoles. Providing\ndirect physical insights, we also show that coupling the Rayleigh anomaly of\nthe array with the electric and magnetic dipoles of the individual\nnanoresonators can result in the formation of different types of BICs. We\nutilize the resonances in the visible regime to achieve lasing action at room\ntemperature with high spatial directionality and low threshold. Finally, we\nexperimentally demonstrate multi-mode, directional lasing and study the\nBIC-assisted lasing mode engineering in arrays of dielectric nanoresonators. We\nbelieve that our results enable a new range of applications in flat photonics\nthrough realizing on-chip controllable single and multi-wavelength\nmicro-lasers.\n