Abstract

Terahertz (THz) wave generation from zinc-blende crystal waveguide, such as GaAs, InP, ZnTe and CdTe, at polariton resonance region (PRR) with a transverse pumping geometry is investigated. It is shown that by using grating vector of periodically inverted crystal, THz wave can be efficiently generated by difference frequency generation (DFG) with a transverse pumping geometry. Parametric gain coefficients in the low-loss limit and absorption coefficients of THz wave during DFG process in the vicinity of PRR are analyzed. The frequency tuning characteristics of THz wave via varying wavelength of difference frequency waves and poling period of periodically inverted crystal are numerically analyzed.

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