Evolution of the onset of coherence in a family of photonic crystal nanolasers Available to Purchase

The authors report on the systematic variation of the onset of lasing in high-$β$ photonic crystal nanolasers. A series of nanocavities has been designed to systematically approach the high-$β$ devices by controlling the number of modes in the $s$-shell spectrum of InAs quantum dots at $4K$⁠. The lasing action is confirmed by the observation of coherent-state transition to Poissonian photon statistics. The quantitative analysis reveals the high $β$ of 0.69, 0.44, and 0.19 for the nanocavities with one, two, and three modes, respectively. By mapping the observed lasing transitions to $β$ factors, the authors demonstrate the interplay of $β$ and lasing performance.