Spectrally resolved wave-mixing between near- and far-infrared pulses in gas
Spectrally resolved wave-mixing between near- and far-infrared pulses in gas
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DOI：
10.1088/1367-2630/15/12/125011
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发表时间：
2013-12-09
影响因子：
3.3
通讯作者：
Morandotti, R.
中科院分区：
文献类型：
--
作者：
Clerici, M.;Faccio, D.;Morandotti, R.
我们研究了强短光脉冲与长波场（中红外和太赫兹）在气体中的非线性混频。我们数值计算表明，和频和差频产生分量之间的拍频可以在相互作用的频谱图中被隔离，并且可以用于对长波长脉冲的电场振荡进行采样。这又可以用作提供关于真实的电场幅度的信息的可能的表征方法。我们的数值模型是支持的光谱分辨测量的四波混频信号从强烈的，单周期太赫兹场（λ> 15 μ m）和光脉冲（λ类似或等于800 nm，50 fs的持续时间）在空气中的相互作用。
We investigate the nonlinear wave-mixing in gases between intense, short optical pulses and long-wavelength fields (mid infrared and terahertz). We show numerically that the beating between the sum-and difference-frequency generation components can be isolated in the spectrogram of the interaction, and can be used to sample the electric field oscillations of the long-wavelength pulses. This, in turn, could be employed as a possible characterization method that provides information on the real electric field amplitude. Our numerical model is supported by spectrally resolved measurements of the four-wave mixing signals obtained from the interaction of intense, single-cycle terahertz fields (lambda > 15 mu m) and optical pulses (lambda similar or equal to 800 nm, 50 fs duration) in air.