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Surface-emitted terahertz-wave difference-frequency generation in two-dimensional periodically poled lithium niobate

机译:二维周期性极化铌酸锂中的表面发射太赫兹波差异频率生成

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We report on the demonstration of surface-emitted terahertz- (THz-) wave difference-frequency generation from two-dimensional (2D) periodically poled lithium niobate (PPLN). The two orthogonal periodic structures individually compensate for both the phase mismatch of the launched lasers and the generated THz wave. Tunable 1.5-1.8 THz wave generation with a bandwidth of 10-GHz was obtained by use of two 2D PPLN crystals. We also confirmed that THz waves were simultaneously generated into two opposite directions, which suggests the possibility of higher THz-wave output power.
机译:我们报告了由二维(2D)周期性极化铌酸锂(PPLN)产生的表面发射太赫兹(THz-)波差异频率的演示。这两个正交周期结构分别补偿了发射激光器的相位失配和所产生的太赫兹波。通过使用两个2D PPLN晶体,可以获得带宽为10-GHz的可调谐1.5-1.8 THz波的产生。我们还证实了太赫兹波同时在两个相反的方向上产生,这暗示了更高的太赫兹波输出功率的可能性。

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