Abstract-Characterization of a hollow core fibre-coupled near field terahertz probe

http://jap.aip.org/resource/1/japiau/v113/i19/p193104_s1?isAuthorized=no

M. Misra¹, Y. Pan¹, C. R. Williams¹, S. A. Maier², and S. R. Andrews¹

¹Department of Physics, University of Bath, Bath BA2 &AY, United Kingdom
²Department of Physics, Imperial College London, London SW7 2AZ, United Kingdom 

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We describe the design and performance of a freely positionable THz near field probe based on a hollow core photonic crystal fibre-coupled photoconducting dipole antenna with an integrated sub-wavelength aperture. Experimental studies of the spatial resolution are compared with detailed finite element electromagnetic simulations and imaging artefacts that are a particular feature of this type of device are discussed. We illustrate the potential applications with descriptions of time domain near field studies of surface waves on a metamaterial and multimode propagation in a parallel plate waveguide.