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Optimization of photomixers and antennas for continuous-wave terahertz emission

By I.S. Gregory, C. Baker, W.R. Tribe, I.V. Bradley, M.J. Evans, E.H. Linfield, A.G. Davies and M. Missous

Abstract

We have studied terahertz emission from interdigitated\ud finger photomixers coupled to planar antenna structures.\ud Using both pulsed and continuous-wave excitation, polarization\ud measurements reveal that the antenna design dominates the properties\ud of the radiated output at frequencies below 0.6 THz, while\ud the efficiency at higher frequencies is additionally dependent on\ud the design of the photomixer fingers. We have produced terahertz\ud maps of the device, characterizing the photomixer by measuring\ud the generated power as a function of the excitation position. Together,\ud these measurements have allowed us to understand better\ud the distinct roles of the photomixer and antenna in emission at\ud different fre

Year: 2005
OAI identifier: oai:eprints.whiterose.ac.uk:732

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