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Orlova, E E; Hovenier, J N; Klaassen, T O; Kasalynas, I; Adam, A J L; Gao, J R; Klapwijk, T M; Williams, B S; Kumar, S; Hu, Q; Reno, J L
Physical review letters, 05/2006, Letnik: 96, Številka: 17Journal Article
An antenna model is proposed for long (L >> A) lasers with subwavelength cross sections (wire lasers). It is shown that the far-field pattern of the wire lasers is determined by the ratio of the wavelength to the length. The radiation of the wire laser is predicted to be concentrated in a narrow beam theta approximately radical(2lambda/L) for laser modes where the longitudinal phase velocity is in synchronism with the velocity of light in air. Experimental results obtained using a terahertz quantum cascade wire laser are in agreement with the model.
