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      Medium-induced change of the optical response of metal clusters in rare-gas matrices

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      Medium-induced change of the optical response of metal clusters in rare-gas matrices.pdf (262.0Kb)
      Author
      Xuan, Fengyuan
      Guet, Claude
      Date of Issue
      2017
      School
      School of Materials Science and Engineering
      Interdisciplinary Graduate School (IGS)
      Research Centre
      Energy Research Institute @NTU
      Version
      Published version
      Abstract
      Interaction with the surrounding medium modifies the optical response of embedded metal clusters. For clusters from about ten to a few hundreds of silver atoms, embedded in rare-gas matrices, we study the environment effect within the matrix random phase approximation with exact exchange (RPAE) quantum approach, which has proved successful for free silver clusters. The polarizable surrounding medium screens the residual two-body RPAE interaction, adds a polarization term to the one-body potential, and shifts the vacuum energy of the active delocalized valence electrons. Within this model, we calculate the dipole oscillator strength distribution for Ag clusters embedded in helium droplets, neon, argon, krypton, and xenon matrices. The main contribution to the dipole surface plasmon red shift originates from the rare-gas polarization screening of the two-body interaction. The large size limit of the dipole surface plasmon agrees well with the classical prediction.
      Subject
      Polarization
      Plasmonics
      Type
      Journal Article
      Series/Journal Title
      Physical Review A
      Rights
      © 2017 American Physical Society (APS). This paper was published in Physical Review A and is made available as an electronic reprint (preprint) with permission of American Physical Society (APS). The published version is available at: [http://dx.doi.org/10.1103/PhysRevA.96.043404]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.
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      http://dx.doi.org/10.1103/PhysRevA.96.043404
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