Title :
Nonlinear response of Au nanostructures observed with intense THz pulses
Author :
Yoshioka, Kazuaki ; Minami, Yasuo ; Dao, T.D. ; Nagao, T. ; Shudo, Kazuyuki ; Takeda, Jun ; Kitajima, Masahiro ; Katayama, Ikufumi
Author_Institution :
Yokohama Nat. Univ., Yokohama, Japan
Abstract :
Intense terahertz pulses are used to investigate nonlinear carrier dynamics in Au thin films with different morphologies. From THz field-dependent transmission measurements, we found that the conductivity in percolated Au nanostructures increases with increasing the incident field strength. The measured complex dielectric dispersion was analyzed using the Drude-Smith model to discuss the dynamics of carriers in a quantitative manner.
Keywords :
electrical conductivity; gold; metallic thin films; nanostructured materials; percolation; permittivity; terahertz wave spectra; Au; Drude-Smith model; THz field-dependent transmission; complex dielectric dispersion; electrical conductivity; gold nanostructured thin films; intense terahertz pulses; morphological properties; nonlinear carrier dynamics; percolated nanostructures; Conductivity; Dielectric measurement; Educational institutions; Films; Gold; Nanostructures; Spectroscopy;
Conference_Titel :
Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on
Conference_Location :
Tucson, AZ
DOI :
10.1109/IRMMW-THz.2014.6956365
