Quantum optical characterization of high-β silver-coated InGaAsP-based multiple quantum well metallic nanolasers

We verify the transition from thermal to coherent emission in excitation-dependent optical measurements on InGaAsP-based multiple quantum well (MQW) metallic nanolasers under continuous-wave excitation in the thresholdless regime and observe distinctive lasing features for the resonance modes through temperature-dependent series with excellent theoretical agreement.