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Terahertz Radiation via Ultrafast Manipulation of Thermoelectric Conversion in Thermoelectric Thin Films
Author(s) -
Takahashi Kouhei,
Kanno Tsutomu,
Sakai Akihiro,
Tamaki Hiromasa,
Kusada Hideo,
Yamada Yuka
Publication year - 2014
Publication title -
advanced optical materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.89
H-Index - 91
ISSN - 2195-1071
DOI - 10.1002/adom.201400009
Subject(s) - materials science , terahertz radiation , thermoelectric effect , optoelectronics , ultrashort pulse , femtosecond , thin film , picosecond , thermoelectric materials , thermoelectric generator , laser , nanotechnology , optics , thermal conductivity , composite material , physics , thermodynamics
An ultrafast terahertz functionality of thermoelectric materials is shown. Femtosecond laser heating results in terahertz emission from thermoelectric Bi 2 Te 3 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.