Optical dynamics of energy-transfer from a CdZnO quantum well to a proximal Ag nanostructure

H. Matsui, Wataru Nomura, T. Yatsui, M. Ohtsu, H. Tabata

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Abstract

We studied photoluminescence (PL) and energy-transfer dynamics in a hybrid structure comprising a Cd0.08Zn0.92O quantum well (QW) and an Ag nanostructure. The observed PL quenching was dependent on the electronic states in the QW. Quenching occurred at low temperature where excited carriers recombined radiatively because of excitonic localization, which disappeared with increasing temperature due to delocalization of excitons. Furthermore, nanostructured Ag surfaces produced local surface plasmon (LSP) absorption that was resonant with the PL peak energy of the QW emission. These results indicate that the recombination energy of excitons transfers nonradiatively to induce LSP excitation, which was revealed using time-resolved PL measurements.

Original languageEnglish
Pages (from-to)3735-3737
Number of pages3
JournalOptics Letters
Volume36
Issue number19
DOIs
Publication statusPublished - Oct 1 2011

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All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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