Fedorov Vladimir Yu, Tzortzakis Stelios
Opt Express. 2018 Nov 26;26(24):31150-31159. doi: 10.1364/OE.26.031150.
We theoretically study the generation of terahertz (THz) radiation by two-color filamentation of ultrashort laser pulses with different wavelengths. We consider wavelengths in the range from 0.6 to 10.6 μm, thus covering the whole range of existing and future powerful laser sources in the near, mid and far-infrared. We show how different parameters of two-color filaments and generated THz pulses depend on the laser wavelength. We demonstrate that there is an optimal laser wavelength for two-color filamentation that provides the highest THz conversion efficiency and results in generation of extremely intense single cycle THz fields.
我们从理论上研究了不同波长超短激光脉冲的双色丝化产生太赫兹（THz）辐射的过程。我们考虑的波长范围是0.6至10.6μm，从而涵盖了近红外、中红外和远红外现有及未来强大激光源的整个范围。我们展示了双色丝和产生的太赫兹脉冲的不同参数如何依赖于激光波长。我们证明，对于双色丝化存在一个最佳激光波长，它能提供最高的太赫兹转换效率，并导致产生极强的单周期太赫兹场。
