Author(s): Koulas-Simos, A (Koulas-Simos, Aris); Buchgeister, J (Buchgeister, Joel); Drechsler, ML (Drechsler, Monty L.); Zhang, TP (Zhang, Taiping); Laiho, K (Laiho, Kaisa); Sinatkas, G (Sinatkas, Georgios); Xu, JL (Xu, Jialu); Lohof, F (Lohof, Frederik); Kan, Q (Kan, Qiang); Zhang, RK (Zhang, Ruikang K.); Jahnke, F (Jahnke, Frank); Gies, C (Gies, Christopher); Chow, WW (Chow, Weng W.); Ning, CZ (Ning, Cun-Zheng); Reitzenstein, S (Reitzenstein, Stephan)

Source: LASER & PHOTONICS REVIEWS Article Number: 2200086 DOI: 10.1002/lpor.202200086 Early Access Date: JUL 2022

Abstract: 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 light emission, becomes increasingly challenging upon approaching a device with a near-perfect spontaneous-emission coupling factor beta. In fact, quantum-optical studies have to be employed to reveal a transition to coherent emission in the intensity fluctuation behavior of nanolasers when the input-output characteristic appears thresholdless for beta = 1 nanolasers. Here, a new indicator for lasing operation in high- beta lasers is identified by showing that stimulated emission can give rise to a lineshape anomaly manifested as a transition from a Lorentzian to a Gaussian component in the emission linewidth that dominates the spectrum above the lasing threshold.

Accession Number: WOS:000819674700001

ISSN: 1863-8880

eISSN: 1863-8899

Full Text: https://onlinelibrary.wiley.com/doi/10.1002/lpor.202200086