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Plasmonic apertures for THz QCL near-field imaging.

Baragwanath, A.J. and Freeman, J.R. and Gallant, A.J. and Zeitler, J.A. and Beere, H.E. and Ritchie, D.A. and Chamberlain, J.M. (2010) 'Plasmonic apertures for THz QCL near-field imaging.', in 35th International Conference on Infrared, Millimeter and Terahertz Waves (IRMMW-THz 2010) : 5 - 10 September 2010, Angelicum, Rome, Italy. Piscataway: IEEE, 1 -2. International Conference on Infrared, Millimeter, and Terahertz Waves : proceedings.


In this paper we report on the fabrication and testing of sub-wavelength apertures surrounded by annular plasmonic structures, for use in near-field imaging with a QCL source. Both double corrugated structures and planarised designs have been tested, with the latter producing a spatially uniform far-field emission profile. Greatly increased transmission has been observed when using plasmonic apertures over standard plain apertures. Sub-wavelength resolution has been measured with a standard, near-field knife-edge test.

Item Type:Book chapter
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Date of first online publication:28 October 2010
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