{
  "id": "1612.04954",
  "version": "v1",
  "published": "2016-12-15T07:43:12.000Z",
  "updated": "2016-12-15T07:43:12.000Z",
  "title": "Instabilities in the optical response of a semiconductor quantum dot - metal nanoparticle heterodimer: self - oscillations and chaos",
  "authors": [
    "Bintoro S. Nugroho",
    "Alexander A. Iskandar",
    "Victor A. Malyshev",
    "Jasper Knoester"
  ],
  "doi": "10.1088/2040-8986/19/1/015004",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We theoretically investigate the nonlinear optical response of a heterodimer comprising a semiconductor quantum dot strongly coupled to a metal nanoparticle. The quantum dot is considered as a three-level ladder system with ground, one-exciton, and bi-exction states. As compared to the case of a two-level quantum dot model, adding the third (bi-exciton) state produces fascinating effects in the optical response of the hybrid system. Specifically, we demonstrate that the system may exhibit picosecond and sub-picosecond self-oscillations and quasi-chaotic behaviour under {\\it single}-frequency continuous wave excitation. An isolated semiconductor quantum dot does not show such features. The effects originate from competing one-exciton and bi-exciton transitions in the semiconductor quantum dot, triggered by the self-action of the quantum dot via the metal nanoparticle. The key parameter that governs the phenomena mentioned is the ratio of the self-action strength and the bi-exciton shift. The self-oscillation regime can be achieved in practice, in particular, in a heterodimer comprised of a closely spaced ZnS/ZnSe core-shell quantum dot and a spherical silver nanoparticle. The results may have applications in nanodevices for generating trains of ultrashort optical pulses.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2016-12-15T07:43:12.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "semiconductor quantum dot",
      "metal nanoparticle heterodimer",
      "optical response",
      "zns/znse core-shell quantum dot",
      "spaced zns/znse core-shell quantum"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "IOP"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}