Characterization of terahertz generation based on the different structures of lithium tantalate crystals

Difference in the terahertz generations from three types of 1 mol % MgO-doped stoichiometric LiTaO₃ crystals were analyzed. Weak single-cycle, multi-cycles, and strong single-cycle terahertz pulses were radiated at bulk, periodically poled, and angle-cut structures, respectively. The three different types of terahertz generation depend on the phase-matching process.