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Surface field excitation by an obliquely incident wave

Konoplev, I.V. and Phipps, A.R. and Phelps, A.D.R. and Robertson, Craig and Ronald, K. and Cross, A.W. (2013) Surface field excitation by an obliquely incident wave. Applied Physics Letters, 102 (14). ISSN 0003-6951

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    Observation of surface field excitation by an obliquely incident wave inside a cylindrical two-dimensional periodic surface lattice is a step forward toward THz Cherenkov amplifiers. Here we observe and discuss this phenomenon, investigating it using different approaches. The results are compared, and it is shown that an increase in the lattice contrast results in excitation of surface fields by an obliquely incident wave resulting in the eigenmode formation. Measurements were conducted by studying forward transmission of the signal, and it is shown that the measured gaps in the spectra are associated with the eigenmode formation rather than band gap establishment.