{
  "id": "2302.07046",
  "version": "v1",
  "published": "2023-02-14T13:59:33.000Z",
  "updated": "2023-02-14T13:59:33.000Z",
  "title": "Lasing of Moiré Trapped MoSe$_2$/WSe$_2$ Interlayer Excitons Coupled to a Nanocavity",
  "authors": [
    "Chenjiang Qian",
    "Mirco Troue",
    "Johannes Figueiredo",
    "Pedro Soubelet",
    "Viviana Villafañe",
    "Johannes Beierlein",
    "Sebastian Klembt",
    "Andreas V. Stier",
    "Sven Höfling",
    "Alexander W. Holleitner",
    "Jonathan J. Finley"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Moir\\'e 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 moir\\'e trapped IXs by integrating a pristine hBN-encapsulated MoSe$_2$/WSe$_2$ heterobilayer in a high-Q ($>10^4$) 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 $78 \\pm 4\\ \\mathrm{\\mu eV}$, fully consistent with the 82 $\\mathrm{\\mu eV}$ predicted by theory. The emission from the cavity mode shows clear threshold-like behaviour. 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 behaviours are significant at resonance whilst weak off-resonance. Our results show that a lasing transition can be induced in interacting moir\\'e trapped IXs with macroscopic coherence extending over the lengthscale of the cavity mode. Such systems raise interesting perspectives for low-power switching and synaptic nanophotonic devices using 2D materials.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2023-02-14T13:59:33.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "interlayer excitons",
      "cavity mode",
      "trapped mose",
      "moire trapped ixs",
      "transition metal dichalcogenides currently attract"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}