Title :
Observation of soft-mode hardening and broadening in SrTiO3 thin films by broadband terahertz time-domain spectroscopy
Author :
Katayama, Ikufumi ; Shimosato, Hiroshi ; Ashida, Masaaki ; Kawayama, Iwao ; Tonouchi, Masayoshi ; Itoh, Tadashi
Author_Institution :
Graduate school of engineering science, Osaka University, 1-3 Machikaneyama-cho, Toyonaka, 560-8531, Japan
Abstract :
Complex dielectric constants of SrTiO3 thin films have been measured using the broadband terahertz time-domain spectroscopy. The broad detection-bandwidth of the photoconductive antenna enables us to clarify soft-mode dispersions as well as the TO2 mode.
Keywords :
Antenna measurements; Dielectric constant; Dielectric thin films; Electrochemical impedance spectroscopy; Ferroelectric materials; Photoconductivity; Pulsed laser deposition; Substrates; Time domain analysis; Transistors;
Conference_Titel :
Quantum Electronics and Laser Science Conference, 2007. QELS '07
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
978-1-55752-834-6
DOI :
10.1109/QELS.2007.4431007
