Abstract A high-efficiency terahertz (THz) wave amplification approach by coupled cascaded optical parametric processes (CCOPP) with orientationally patterned gallium phosphide (OP-GaP) is introduced. The CCOPP comprises two cascaded optical parametric processes (COPP) which are intensely coupled by THz waves and cascaded optical waves via setting a precise periodic vector of OP-GaP. A simulation model that solves for the interactions of THz and cascaded optical waves is employed. The influences of cascading orders, phase mismatches, pump intensities, red-shifted and blue-shifted processes, nonlinear coefficients and absorption coefficients, the initial THz intensities are considered in the calculations. Simulation results predict that more than 7 THz photons are produced from a pump photon by 12 orders CCOPP.

中文翻译：

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通过耦合级联光学参量过程实现高效太赫兹波放大

摘要 介绍了一种采用定向图案化磷化镓 (OP-GaP) 耦合级联光学参量过程 (CCOPP) 的高效太赫兹 (THz) 波放大方法。CCOPP 包括两个级联光参量过程 (COPP)，它们通过设置 OP-GaP 的精确周期矢量，通过太赫兹波和级联光波强烈耦合。采用了求解太赫兹和级联光波相互作用的仿真模型。计算中考虑了级联阶数、相位失配、泵浦强度、红移和蓝移过程、非线性系数和吸收系数、初始太赫兹强度的影响。模拟结果预测超过 7 THz 的光子由 12 个 CCOPP 级泵浦光子产生。