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.
Bibliographical noteFunding Information:
The work at Yonsei (J. Kim, I. Maeng, and H. Choi) was supported by the LG Display academic industrial cooperation program and Basic Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (No. 2011-0013255) and also supported by the NRF grant funded by the Korean government (NRF-2011-220-D00052, No. 2011-0028594, No. 2011-0032019). J. Jung and H. Song were supported by the NRF grant funded by the Korean government (Ministry of Education, Science, and Technology) (R11-2007-050-00000-0). S. J. Lee and J. M. Myoung were supported by WCU (World Class University) program through the NRF funded by the Ministry of Education, Science, and Technology (R32-20031).
All Science Journal Classification (ASJC) codes
- Physics and Astronomy (miscellaneous)