Lasing of moiré trapped MoSe2/WSe2 interlayer excitons coupled to a nanocavity

Moiré trapped interlayer excitons (IXs) in heterobilayer transition metal dichalcogenides currently attract strong interest due to their potential for non-classical light generation, coherent spin-photon interfaces and exploring novel correlated phases of electrons. Here, we report lasing of moiré trapped IXs by integrating a pristine hBN-encapsulated MoSe2/WSe2 heterobilayer in a high-Q (> 104) nanophotonic cavity. We control the detuning between the IX line and the cavity mode with a magnetic field and measure the dipolar coupling strength to the cavity mode to be 78 ± 4 μeV, fully consistent with the 82 μeV predicted by theory. The emission from the cavity mode shows clear threshold-like behavior. We observe a superlinear power dependence accompanied by a narrowing of the linewidth as the distinct features of lasing. The onset and prominence of these threshold-like behaviors are significant at resonance whilst weak off-resonance. Our results show that a lasing transition can be in..., , , # · Lasing of Moiré Trapped MoSe2/WSe2 Interlayer Excitons Coupled to a Nanocavity

These datasets were collected using the confocal micro-photoluminescence (PL) setup for the spectroscopy of cavity-moiré interlayer exciton (IX) coupling. We controlled the excitation power and exciton-photon detuning to demonstrate the coupling and lasing in the system. We further investigated the system with the excitation laser at different wavelength to manipulatie the exciton photo-physics and the non-linearity in lasing.

## Description of the data and file structure

* Coupling.opju is the data for exciton-photon coupling at low excitation power.

* In folder 1c, \"PLs-noise corrected\" is the figure and corresponding data for the magneto PL spectra. \"PLs-raw\" is the raw data before noise datapoints are corrected.
* In folder 1b, \"step1 PLs-baseline subtracted\" is the data in which the emission baseline is subtracted. \"step2 fit g\" is the cavity peak linewidth extracted by fitting th...