title: Antenna model for wire lasers.
abstract: 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.
authors.affiliation: Institute for Physics of Microstructures, Russian Academy of Sciences, Nishny Novgorod GSP-105. orlova@ipm.sci-nnov.ru
authors.forename: E E
authors.initials: EE
authors.lastname: Orlova
authors.forename: J N
authors.initials: JN
authors.lastname: Hovenier
authors.forename: T O
authors.initials: TO
authors.lastname: Klaassen
authors.forename: I
authors.initials: I
authors.lastname: Kasalynas
authors.forename: A J L
authors.initials: AJ
authors.lastname: Adam
authors.forename: J R
authors.initials: JR
authors.lastname: Gao
authors.forename: T M
authors.initials: TM
authors.lastname: Klapwijk
authors.forename: B S
authors.initials: BS
authors.lastname: Williams
authors.forename: S
authors.initials: S
authors.lastname: Kumar
authors.forename: Q
authors.initials: Q
authors.lastname: Hu
authors.forename: J L
authors.initials: JL
authors.lastname: Reno