Abstract-Terahertz Radiation via Ultrafast Manipulation of Thermoelectric Conversion in Thermoelectric Thin Films

1. Kouhei Takahashi^*, 
2. Tsutomu Kanno,
3. Akihiro Sakai, 
4. Hiromasa Tamaki, 
5. Hideo Kusada, 
6. Yuka Yamada

Article first published online: 26 FEB 2014

http://onlinelibrary.wiley.com/doi/10.1002/adom.201400009/abstract?deniedAccessCustomisedMessage=&userIsAuthenticated=false

DOI: 10.1002/adom.201400009

An ultrafast terahertz functionality of thermoelectric materials is shown. Femtosecond laser heating results in terahertz emission from thermoelectric Bi₂Te₃ thin films in a non-standard manner. The results manifest an ultrafast build-up of the thermal diffusion current on the picosecond order, which is useful for the development of high-speed optoelectronic thermoelectric devices.