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Time‐resolved THz spectroscopy in a parallel plate waveguide
Author(s) -
Cooke David G.,
Jepsen Peter Uhd
Publication year - 2009
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200881281
Subject(s) - terahertz radiation , spectroscopy , waveguide , attenuation coefficient , materials science , optics , terahertz spectroscopy and technology , excitation , absorption (acoustics) , optoelectronics , physics , quantum mechanics
We demonstrate time‐resolved terahertz spectroscopy inside a novel parallel plate waveguide where one of the metallic plates is replaced by a transparent conducting oxide. Considerable improvements to the waveguide loss coefficient are shown, with a power absorption coefficient of 4 cm –1 at 0.5 THz. The time resolution of the technique is shown to be limited by the spatial excitation profile, which for sharply focused beams can approach ∼1 ps time scales. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)