Ultrafast carrier dynamics in ZnO nanorods

Chi Kuang Sun, Shih Ze Sun, Kung Hsuan Lin, Kenneth Yi Jie Zhang, Hsiang Lin Liu, Sai Chang Liu, Jih Jen Wu

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

Free exciton and above-band-gap free carrier dynamics in ZnO nanorods have been investigated at room temperature with a femtosecond transient transmission measurement. Following the photoexcitation of above-band-gap free carriers, an extremely fast external thermalization time on the order of 200 fs can be observed. Under high excitation, hot phonon effects were found to delay the carrier cooling process. While the photoexcitation energy was tuned to match the free exciton transition, stable exciton formation can be uncovered while no evident exciton ionization process can be found unless the photoexcited exciton density exceeded the Mott density.

Original languageEnglish
Article number023106
JournalApplied Physics Letters
Volume87
Issue number2
DOIs
Publication statusPublished - 2005 Jul 11

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nanorods
excitons
photoexcitation
cooling
ionization
room temperature
excitation
energy

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

Cite this

Sun, C. K., Sun, S. Z., Lin, K. H., Zhang, K. Y. J., Liu, H. L., Liu, S. C., & Wu, J. J. (2005). Ultrafast carrier dynamics in ZnO nanorods. Applied Physics Letters, 87(2), [023106]. https://doi.org/10.1063/1.1989444

Ultrafast carrier dynamics in ZnO nanorods. / Sun, Chi Kuang; Sun, Shih Ze; Lin, Kung Hsuan; Zhang, Kenneth Yi Jie; Liu, Hsiang Lin; Liu, Sai Chang; Wu, Jih Jen.

In: Applied Physics Letters, Vol. 87, No. 2, 023106, 11.07.2005.

Research output: Contribution to journalArticle

Sun, CK, Sun, SZ, Lin, KH, Zhang, KYJ, Liu, HL, Liu, SC & Wu, JJ 2005, 'Ultrafast carrier dynamics in ZnO nanorods', Applied Physics Letters, vol. 87, no. 2, 023106. https://doi.org/10.1063/1.1989444
Sun CK, Sun SZ, Lin KH, Zhang KYJ, Liu HL, Liu SC et al. Ultrafast carrier dynamics in ZnO nanorods. Applied Physics Letters. 2005 Jul 11;87(2). 023106. https://doi.org/10.1063/1.1989444
Sun, Chi Kuang ; Sun, Shih Ze ; Lin, Kung Hsuan ; Zhang, Kenneth Yi Jie ; Liu, Hsiang Lin ; Liu, Sai Chang ; Wu, Jih Jen. / Ultrafast carrier dynamics in ZnO nanorods. In: Applied Physics Letters. 2005 ; Vol. 87, No. 2.
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