A time gating technique based on Four Wave Mixing was developed to measure for the first time the temporal profile of a 1D PhC nanolaser operating in the telecom range at room temperature. Our method enabled a resolution of 1 ps and a detection sensitivity of 200 nW peak power. Our results show a build-up time of the emission of around 30ps and a decay time of 35ps. This shows the potential of these nanolasers for encoding data at a high bit rate (15 GHz).

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Federico Monti, Alejandro Giacomotti, Fabrice Raineri, and Giuseppe Modica, "Four-wave mixing to measure the pulse duration of photonic crystal nanolasers," Proc. SPIE PC12431, Photonic and Phononic Properties of Engineered Nanostructures XIII, PC124310A (Presented at SPIE OPTO: January 31, 2023; Published: 17 March 2023); https://doi.org/10.1117/12.2648198.6321434179112.