Coherent soft x-ray generation in the water window with quasi-phase matching

被引：304

作者：

Gibson, EA

Paul, A

Wagner, N

Tobey, R

Gaudiosi, D

Backus, S

Christov, IP

Aquila, A

Gullikson, EM

Attwood, DT

Murnane, MM

Kapteyn, HC ^{[1
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Univ Colorado, Joint Inst Lab Astrophys, Boulder, CO 80309 USA

[3] Univ Sofia, Dept Phys, BU-1126 Sofia, Bulgaria

[4] Univ Calif Berkeley, Lawrence Berkeley Lab, Ctr Xray Opt, Berkeley, CA 94720 USA

来源：

SCIENCE | 2003年 / 302卷 / 5642期

关键词：

D O I：

10.1126/science.1088654

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

We demonstrate enhanced generation of coherent light in the "water window" region of the soft x-ray spectrum at 4.4 nanometers, using quasi-phase-matched frequency conversion of ultrafast laser pulses. By periodically modulating the diameter of a gas-filled hollow waveguide, the phase mismatch normally present between the laser light and the generated soft x-ray light can be partially compensated. This makes it possible to use neon gas as the nonlinear medium to coherently convert light up to the water window, illustrating that techniques of nonlinear optics can be applied effectively in the soft x-ray region of the spectrum. These results advance the prospects for compact coherent soft x-ray sources for applications in biomicroscopy and in chemical spectroscopy.

引用

页码：95 / 98

页数：4

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