Shortening X-Ray Pulse Duration via Saturable Absorption

被引：13

作者：

Inoue, Ichiro ^{[1
]}

Inubushi, Yuichi ^{[1
,2
]}

Osaka, Taito ^{[1
]}

Yamada, Jumpei ^{[1
]}

Tamasaku, Kenji ^{[1
]}

Yoneda, Hitoki ^{[3
]}

Yabashi, Makina ^{[1
,2
]}

机构：

[1] RIKEN, SPring 8 Ctr, 1-1-1 Kouto, Sayo, Hyogo 6795148, Japan

[2] Japan Synchrotron Radiat Res Inst, Kouto 1-1-1, Sayo, Hyogo 6795198, Japan

[3] Univ Electrocommun, Chofugaoka 1-5-1, Chofu, Tokyo 1828585, Japan

来源：

PHYSICAL REVIEW LETTERS | 2021年 / 127卷 / 16期

基金：

日本学术振兴会;

关键词：

LASER; SINGLE;

D O I：

10.1103/PhysRevLett.127.163903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

To shorten the duration of x-ray pulses, we present a nonlinear optical technique using atoms with core-hole vacancies (core-hole atoms) generated by inner-shell photoionization. The weak Coulomb screening in the core-hole atoms results in decreased absorption at photon energies immediately above the absorption edge. By employing this phenomenon, referred to as saturable absorption, we successfully reduce the duration of x-ray free-electron laser pulses (photon energy: 9.000 keV, duration: 6-7 fs, fluence: 2.0-3.5 x 10(5) J/cm(2)) by similar to 35%. This finding that core-hole atoms are applicable to nonlinear x-ray optics is an essential stepping stone for extending nonlinear technologies commonplace at optical wavelengths to the hard x-ray region.

引用

页数：6

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