Quantum Fluctuations and Lineshape Anomaly in a High? <i>?</i> Silver?Coated InP?Based Metallic Nanolaser

Metallic nanocavity lasers provide important technological advancement toward even smaller integrable light sources. They give access to widely unexplored lasing physics in which the distinction between different operational regimes, like those of thermal or coherent emission, becomes increasingly challenging upon approaching a device with near-perfect spontaneous-emission coupling factor ? $\beta$ . In fact, quantum-optical studies have be employed reveal transition emission intensity fluctuation behavior nanolasers when input–output characteristic appears thresholdless for = 1 $\beta 1$ nanolasers. Here, new indicator operation high- is identified by showing that stimulated can rise lineshape anomaly manifested as from Lorentzian Gaussian component linewidth dominates spectrum above threshold.