Single and Multi?Mode Directional Lasing from Arrays of Dielectric Nanoresonators

The strong electric and magnetic resonances in dielectric subwavelength structures have enabled unique opportunities for efficient manipulation of light–matter interactions. Besides, the dramatic enhancement nonlinear interactions near so-called bound states continuum (BICs) has recently attracted enormous attention due to potential advancements. However, experimental realizations applications high-Q factor visible thus far been considerably limited. In this work, interplay dipoles arrays nanoresonators is explored. realization through collective diffractive coupling reported. It also shown that Rayleigh anomaly array with individual can result formation different types BICs. regime utilized achieve lasing action at room temperature high spatial directionality low threshold. Finally, multi-mode, directional experimentally demonstrated BIC-assisted mode engineering studied. believed results enable a new range flat photonics realizing on-chip controllable single multi-wavelength micro-lasers.