Generation of strong optical field in soft X-ray region by using high-order harmonics

被引：70

作者：

Takahashi, EJ ^{[1
]}

Nabekawa, Y

Mashiko, H

Hasegawa, H

Suda, A

Midorikawa, K

机构：

[1] RIKEN, Laser Technol Lab, Wako, Saitama 3510198, Japan

[2] Saitama Univ, Dept Informat & Math Sci, Urawa, Saitama 3388570, Japan

来源：

IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2004年 / 10卷 / 06期

关键词：

coherent soft X-ray and extreme ultraviolet (XUV); high-order harmonic; nonlinear optics; phase matching; ultrafast optics;

D O I：

10.1109/JSTQE.2004.838077

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

For further development of a variety of applications, one of the most important issues is the improvement of output harmonic energy and conversion efficiency. We review our work on the energy scaling of high-order harmonic generation based on phase-matching using a loosely focused beam. Our harmonic energy scaling method can be universally applied to harmonic generation in the neutral rare gas target. In addition, we demonstrate a new concept for spatial separation between the high-energy pump and harmonic beam to increase the available soft X-ray energy for the applications. This method is very simple and highly useful for riot only high-order harmonic generation but also longitudinally pumped X-ray lasers. By combining the high-energy high harmonic source and new spatial separation method, we successfully demonstrate focusing of the soft X-ray beam with a peak intensity of 1 x 10(14) W/cm(2), which is to our knowledge the highest ever reported in the soft X-ray region.

引用

页码：1315 / 1328

页数：14

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