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Proceedings Paper

Time-resolved detection of far-field THz-radiation patterns: spatially restricted coherence of surface field THz emitters
Author(s): F. Hilbk-Kortenbruck; Peter Haring Bolivar; Rainer Martini; Henricus P. M. Pellemans; Heinrich Kurz
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Paper Abstract

The measurements of the spatial coherence of a macroscopic ensemble of carriers excited coherently by femtosecond laser pulses is presented. The spatial coherence of the excited ensemble is derived from time- and spatially resolved measurements of the far-field THz-emission pattern. The analysis concentrates on surface field emitters, which are widespread broadband sources of coherent THz-radiation. We find that these emitters are fully spatially coherent for emission frequencies up to 1.6 THz, above which frequency the spatial coherence starts to decrease. For frequencies above 2.5 THz the spatial coherence of the emitter is limited to one THz wavelength.

Paper Details

Date Published: 9 September 1999
PDF: 4 pages
Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); doi: 10.1117/12.361051
Show Author Affiliations
F. Hilbk-Kortenbruck, Technische Univ. Aachen (Germany)
Peter Haring Bolivar, Technische Univ. Aachen (Germany)
Rainer Martini, Technische Univ. Aachen (Germany)
Henricus P. M. Pellemans, Technische Univ. Aachen (Germany)
Heinrich Kurz, Technische Univ. Aachen (Germany)

Published in SPIE Proceedings Vol. 3828:
Terahertz Spectroscopy and Applications II
J. Martyn Chamberlain, Editor(s)

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