title: High-resolution time-of-flight terahertz tomography using a femtosecond fiber laser.
abstract: High-resolution tomographic imaging is demonstrated using a reflection-type terahertz time-domain spectroscopy. To realize a practical system for general use, a robust all-fiber laser was used as the pump light source. Broadband terahertz waves were generated with the combination of optical pulses compressed to 17 fs using optical fibers and a DAST crystal. Using deconvolution signal processing, the wideband spectrum of the generated terahertz waves provided high-axial resolution leading to successful imaging of a multilayered structure containing a 2-microm-thin GaAs layer. To our knowledge, this is the first demonstration of terahertz tomographic imaging of such a thin layer.
authors.affiliation: Nagoya University, Chikusa-ku, Nagoya 464-8603, Japan. jtak@ktd.biglobe.ne.jp
authors.forename: Jun
authors.initials: J
authors.lastname: Takayanagi
authors.forename: Hiroki
authors.initials: H
authors.lastname: Jinno
authors.forename: Shingo
authors.initials: S
authors.lastname: Ichino
authors.forename: Koji
authors.initials: K
authors.lastname: Suizu
authors.forename: Masatsugu
authors.initials: M
authors.lastname: Yamashita
authors.forename: Toshihiko
authors.initials: T
authors.lastname: Ouchi
authors.forename: Shintaro
authors.initials: S
authors.lastname: Kasai
authors.forename: Hideyuki
authors.initials: H
authors.lastname: Ohtake
authors.forename: Hirohisa
authors.initials: H
authors.lastname: Uchida
authors.forename: Norihiko
authors.initials: N
authors.lastname: Nishizawa
authors.forename: Kodo
authors.initials: K
authors.lastname: Kawase
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005336:Fiber Optic Technology / Q000295:instrumentation*; D007834:Lasers; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D013057:Spectrum Analysis / Q000295:instrumentation*; D055053:Terahertz Radiation; D041622:Tomography, Optical / Q000295:instrumentation*