Quantum dot photonic-crystal-slab nanocavities: Quality factors and lasing (original) (raw)

The study investigates quality factors and lasing mechanisms in photonic-crystal-slab nanocavities embedded with quantum dots (QDs). It elucidates the detrimental effects of ensemble QD absorption on the quality factor Q, which hinders strong coupling between quantum dots and cavity modes. The findings reveal that while high-density QDs can provide sufficient gain for lasing, they simultaneously introduce absorption losses that significantly lower Q, ultimately complicating efforts to observe strong coupling in such systems.