Field-induced Stark effects in Ag-coated CdS quantum dots

Koo Chul Je, Sang Youp Yim, Jae Hoon Lee, Eun Hee Jeang, Seung Han Park

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

Field-induced Stark effects in Ag-coated CdS quantum dot structures are presented. We observe clear exciton peaks due to the quantum confinement effect and the surface plasmon effect in Ag-coated CdS quantum dot fabricated by gamma ray irradiation method. In addition, we observed also a dominant red-shift of the CdS exciton absorption peak as the Wannier Stark effect, implying the strong local field effect in the metal-coated semiconductor composite quantum dot system. The Stark shift of the exciton peak is investigated as a function of the local field for different silver thickness and various sizes of quantum dots based on the effective-mass Hamiltonian using the numerical-matrix-diagonalization method.

Original languageEnglish
Article number30
Pages (from-to)146-151
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
Volume5734
DOIs
Publication statusPublished - 2005 Aug 22
EventQuantum Dots, Nanoparticles, and Nanoclusters II - San Jose, CA, United States
Duration: 2005 Jan 242005 Jan 25

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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