Villoresi P, Ceccherini P, Poletto L, Tondello G, Altucci C, Bruzzese R, Nisoli M, Stagira S, Cerullo G, Svelto O
Istituto Nazionale Fisica della Materia, Laboratorio di Elettronica Quantistica-D.E.I., Universita di Padova, Padova, Italy.
Phys Rev Lett. 2000 Sep 18;85(12):2494-7. doi: 10.1103/PhysRevLett.85.2494.
Harmonic radiation generated in a neon gas jet by sub-10-fs laser pulses was investigated both experimentally and theoretically. The spectral profile of the harmonics with respect to the order, their intensity and relative spectral shifts were measured as a function of the position of the gas jet. The results point out spectral features typical of the quasi-single-cycle excitation regime. A nonadiabatic three-dimensional numerical model was developed, which provides harmonic spectra in remarkable agreement with the experiments.
研究了亚10飞秒激光脉冲在氖气射流中产生的谐波辐射，包括实验研究和理论研究。测量了谐波的光谱轮廓（相对于谐波阶数）、强度和相对光谱位移随气体射流位置的变化。结果指出了准单周期激发 regime 典型的光谱特征。建立了一个非绝热三维数值模型，该模型给出的谐波光谱与实验结果非常吻合。
