Superluminal terahertz pulses

Wynne, K. and Jaroszynski, D.A. (1999) Superluminal terahertz pulses. Optics Letters, 24 (1). pp. 25-27. ISSN 0146-9592

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Abstract

In femtosecond terahertz-pulse (T-ray) imaging of metal structures with dimensions of the order of the wavelength, it is observed that the T rays propagate faster than the vacuum speed of light. In the case of apertures this can be understood as a waveguide effect in which superluminal velocities are expected close to the cutoff frequency. However, the effect is also observed close to knife edges and in propagation past thin metal wires.

ORCID iDs

Wynne, K. ORCID logoORCID: https://orcid.org/0000-0002-5305-5940 and Jaroszynski, D.A. ORCID logoORCID: https://orcid.org/0000-0002-3006-5492;