title: Elliptically polarized THz-wave generation from GaP-THz planar waveguide via collinear phase-matched difference frequency mixing.
abstract: We carried out terahertz (THz)-wave generation from the GaP planar waveguides under collinear phase-matched difference-frequency mixing of two near-infrared sources. TE- and TM-mode of THz-waves were generated simultaneously by adjusting the polarization direction of two incident infrared sources. The phase shift between TE- and TM-mode of THz-wave in the waveguide was dependent on the waveguide length and contributed to the generation of the elliptical polarized THz-wave. The ellipticity of generated THz-wave increased as waveguide length increased. We indicated the possibility of control of rotational direction of elliptical polarization of emitted THz wave.
authors.affiliation: Department of Materials Science, Graduate School of Engineering, Tohoku University, Aoba-yama 6-6-11-1021, Sendai 980-8579 Japan. k-saito@material.tohoku.ac.jp
authors.forename: Kyosuke
authors.initials: K
authors.lastname: Saito
authors.forename: Tadao
authors.initials: T
authors.lastname: Tanabe
authors.forename: Yutaka
authors.initials: Y
authors.lastname: Oyama