{
  "id": "1808.01002",
  "version": "v1",
  "published": "2018-08-02T19:49:06.000Z",
  "updated": "2018-08-02T19:49:06.000Z",
  "title": "Observation of the hot phonon bottleneck mitigation in supported graphene",
  "authors": [
    "Rustam Gatamov",
    "Andrey Baydin",
    "Halina Krzyzanowska",
    "Norman Tolk"
  ],
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "Understanding the ultrafast carrier dynamics of graphene on a substrate is a fundamental step in the development of graphene based opto-electronic devices. In this letter, we present ultrafast pump-probe measurements of the supported graphene on quartz for a range of pump fluences that enable us to observe both decreased and enhanced probe transmission regimes on a femtosecond timescale. At a critical pump fluence, we observe a 10-fold decrease in the relaxation time constant which is correlated to fluence dependent transition from a bi-exponential to a single exponential decay pattern of the measured differential transmission. This suggests a mitigation of the hot phonon bottleneck that compromises the performance of graphene based devices.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-08-02T19:49:06.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "hot phonon bottleneck mitigation",
      "supported graphene",
      "observation",
      "pump fluence",
      "enhanced probe transmission regimes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}