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Microphotoluminescence study of exciton polaritons guided in ZnO nanorods

Appl. Phys. Lett. 95, 173109 (2009); doi:10.1063/1.3257366

Published 28 October 2009

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Wenliang Li,1 Min Gao,1 Xiaoxian Zhang,1 Dongfang Liu,2 Lian-Mao Peng,1 and Sishen Xie1,2
1Department of Electronics and Key Laboratory for the Physics and Chemistry of Nanodevices, Peking University, Beijing 100871, People's Republic of China
2Institute of Physics, Chinese Academy of Sciences, Beijing 100080, People's Republic of China
By confocal microphotoluminescence spectroscopy, we study the influence of the localized excitation position on the guided near band edge emission from the end facets of ZnO nanorods. An increased propagation distance of the guided emission causes dramatically depressed excitonic emission and pronounced blueshifts of the Fabry–Pérot cavity modes. The blueshifts can be understood on the basis of enhanced inelastic processes of the exciton polaritons guided in the nanorod cavities and reduced oscillator strength. The blueshifts exhibit local maxima at LO phonon-related emissions, emphasizing the role of the LO phonons in the relaxation and inelastic scattering of the exciton polaritons. ©2009 American Institute of Physics
History: Received 18 July 2009; accepted 6 October 2009; published 28 October 2009
Permalink: http://link.aip.org/link/?APPLAB/95/173109/1
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KEYWORDS and PACS

Keywords
PACS
  • 78.55.Et
    Photoluminescence in II-VI semiconductors
  • 81.05.Dz
    II-VI semiconductors: fabrication, treatment, testing and analysis
  • 71.36.+c
    Polaritons
  • 81.07.Bc
    Nanocrystalline materials: fabrication and characterization
  • 61.46.-w
    Structure of nanoscale materials
  • 63.22.-m
    Phonons or vibrational states in low-dimensional structures and nanoscale materials
  • 71.35.-y
    Excitons and related phenomena
  • YEAR: 2009

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PUBLICATION DATA

ISSN:
0003-6951 (print)   1077-3118 (online)
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