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

H. Matsui; W. Nomura; T. Yatsui; M. Ohtsu; H. Tabata

doi:10.1364/OL.36.003735

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

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

Research output: Contribution to journal › Article › peer-review

4 Citations (Scopus)

Abstract

We studied photoluminescence (PL) and energy-transfer dynamics in a hybrid structure comprising a Cd_0.08Zn_0.92O 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 language	English
Pages (from-to)	3735-3737
Number of pages	3
Journal	Optics Letters
Volume	36
Issue number	19
DOIs	https://doi.org/10.1364/OL.36.003735
Publication status	Published - Oct 1 2011

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics

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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.",

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AU - Matsui, H.

AU - Nomura, W.

AU - Yatsui, T.

AU - Ohtsu, M.

AU - Tabata, H.

PY - 2011/10/1

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AB - 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.

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