High-order harmonic generation up to 250 eV from highly ionized argon.
High-order harmonic generation up to 250 eV from highly ionized argon.
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DOI：
10.1103/physrevlett.92.033001
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发表时间：
2004-01
影响因子：
8.6
通讯作者：
E. Gibson;A. Paul;N. Wagner;R. Tobey;S. Backus;I. Christov;M. Murnane;H. Kapteyn
中科院分区：
文献类型：
--
作者：
E. Gibson;A. Paul;N. Wagner;R. Tobey;S. Backus;I. Christov;M. Murnane;H. Kapteyn
我们演示了使用氩气产生高达 250 eV 的极高次谐波。这将之前使用 Ar 观察到的最高谐波扩展了 100 eV，并且超过了使用除氦之外的任何其他介质观察到的能量。这一进步是通过使用波导几何形状来限制等离子体引起的激光束散焦而实现的，从而可以从 Ar 离子产生高次谐波。这项工作表明，离子的高次谐波发射可以将基于激光的相干上转换扩展到光谱的软 X 射线区域。
We demonstrate the generation of very high-order harmonics, up to 250 eV, using argon gas. This extends by 100 eV the highest harmonics previously observed using Ar and exceeds the energies observed using any other medium besides helium. This advance is made possible by using a waveguide geometry to limit plasma-induced laser beam defocusing, making it possible to generate high harmonics from Ar ions. This work shows that high harmonic emission from ions can extend laser-based coherent up-conversion into the soft x-ray region of the spectrum.