Open AccessElliptically polarized THz-wave generation from GaP-THz planar waveguide via collinear phase-matched difference frequency mixing
Author(s) -
Kodai Saito,
Tadao Tanabe,
Yutaka Oyama
Publication year - 2012
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.20.026082
Subject(s) - terahertz radiation , optics , polarization (electrochemistry) , waveguide , planar , elliptical polarization , physics , materials science , linear polarization , laser , chemistry , computer graphics (images) , computer science
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.