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9 September 1999 Time-resolved detection of far-field THz-radiation patterns: spatially restricted coherence of surface field THz emitters
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Proceedings Volume 3828, Terahertz Spectroscopy and Applications II; (1999) https://doi.org/10.1117/12.361051
Event: Industrial Lasers and Inspection (EUROPTO Series), 1999, Munich, Germany
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.
© (1999) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
F. Hilbk-Kortenbruck, Peter Haring Bolivar, Rainer Martini, Henricus P. M. Pellemans, and Heinrich Kurz "Time-resolved detection of far-field THz-radiation patterns: spatially restricted coherence of surface field THz emitters", Proc. SPIE 3828, Terahertz Spectroscopy and Applications II, (9 September 1999); https://doi.org/10.1117/12.361051
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