Molloy, J F; Naftaly, M; Dudley, R A (2013) Characterisation of terahertz beam profile and propagation. IEEE J. Sel. Top. Quantum Electron., 19 (1). 8401508

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Abstract

Two techniques for imaging a THz beam profile are described and employed in characterising the THz beam propagation in a time-domain spectrometer. Aperture scanning yields a 2D cross-sectional map of field amplitude at selected frequencies which is used to track beam evolution along its path. The Hartmann test produces a 2D topographical image of the wavefront, also at selected frequencies. The results are compared with theory, and the respective advantages of the two methods are discussed.

Item Type:	Article
Keywords:	terahertz, beam imaging
Subjects:	Electromagnetics Electromagnetics > Terahertz
Identification number/DOI:	10.1109/JSTQE.2012.2205668
Last Modified:	02 Feb 2018 13:14
URI:	http://eprintspublications.npl.co.uk/id/eprint/5735

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