Science Advances

This PDF file includes:

• Note S1. PhCC design.
• Note S2. Raman spectra of monolayer MoS₂ and WSe₂.
• Note S3. Coherence time measurement setup.
• Note S4. β Factor fitting.
• Note S5. Effect of the lifetime on lasing threshold.
• Fig. S1. Raman spectra of monolayer MoS₂ and WSe₂.
• Fig. S2. Michelson interferometer for coherent length measurement.
• Fig. S3. Illustration of the light-matter interaction.
• Fig. S4. Lasing threshold versus exciton lifetime.
• Fig. S5. Comparison between the PL spectrum from MoS₂/WSe₂ heterostructure and the PL spectrum from the silicon substrate.
• Fig. S6. Photonic cavity characterization.
• Table S1. Definition and values of the parameters used in the theoretical model.
• References (24–28)

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