3ω/2谐波光谱与发射角度的关系

Three-halves Harmonic Emission from Au-Disk Irradiated by 1.053μm Laser

测量了 1 .0 53μm激光和金盘靶相互作用产生的 3ω/ 2谐波红移峰的波长移动量与谐波发射角度之间的关系 ,并根据有关物理模型推断出电子温度 ,排除了 3ω/ 2谐波与 TPD不稳定性发生在同一区域的可能性。

Time-integrated spectra of three -halves harmonic emission from Au-disk irradiated by 1.053μm laser are experi mentally studied. The wavelength shifts of red-shifted peak of the harmonic emi ssion are measured in different angles. Fitting the experimental results to Barr s and Giuliettis theory shows that both theories can predict the correct dep endence of the wavelength shift on the cosine of the emission angle while the fo rmer underestimates the electron temperature, and the later gives a result more close to that measured by X-ray.