Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications

Jaeseok Kim, Inhee Maeng, Jongwook Jung, Hyunjoon Song, Joo Hiuk Son, Kilsuk Kim, Jaeik Lee, Chul Hong Kim, Geesung Chae, Myungchul Jun, Yongkee Hwang, Jeong Su Lee, Jae Min Myoung, Hyunyong Choi

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Abstract

We have investigated the complex conductivity of silver nanowire thin films using terahertz time-domain spectroscopy. Maxwell-Garnett effective medium theory, which accounts for the effective complex conductivity of silver nanowires, is presented in detail theoretically and experimentally. The conductivity of nanowires exhibits a characteristic non-Drude response in which the applied terahertz field is polarized in the longitudinal nanowire direction. The non-Drude responses of the silver nanowires are explained by the Gans approximation and the Drude-Smith model, and both agree well with the experimental data. Our results provide a basis for further explorations of charge carrier dynamics in nanowire-based transparent electrode applications.

Original languageEnglish
Article number011109
JournalApplied Physics Letters
Volume102
Issue number1
DOIs
Publication statusPublished - 2013 Jan 7

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Kim, J., Maeng, I., Jung, J., Song, H., Son, J. H., Kim, K., Lee, J., Kim, C. H., Chae, G., Jun, M., Hwang, Y., Lee, J. S., Myoung, J. M., & Choi, H. (2013). Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications. Applied Physics Letters, 102(1), [011109]. https://doi.org/10.1063/1.4773179