Resolution enhancement in coherent x-ray diffraction imaging by overcoming instrumental noise

被引：17

作者：

Kim, Chan ^{[1
,2
]}

Kim, Yoonhee ^{[1
,2
]}

Song, Changyong ^{[3
]}

Kim, Sang Soo ^{[4
]}

Kim, Sunam ^{[4
]}

Kang, Hyon Chol ^{[5
]}

Hwu, Yeukuang ^{[6
]}

Tsuei, Ku-Ding ^{[7
]}

Liang, Keng San ^{[6
,7
]}

Noh, Do Young ^{[1
,2
]}

机构：

[1] Gwangju Inst Sci & Technol, Dept Phys & Photon Sci, Kwangju 500712, South Korea

[2] Gwangju Inst Sci & Technol, Sch Mat Sci & Engn, Kwangju 500712, South Korea

[3] RIKEN, SPring Ctr 8, Sayo, Hyogo 6795148, Japan

[4] Pohang Accelerator Lab, Pohang 790834, South Korea

[5] Chosun Univ, Dept Adv Mat Engn, Kwangju 501759, South Korea

[6] Acad Sinica, Inst Phys, Taipei 11529, Taiwan

[7] Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan

来源：

OPTICS EXPRESS | 2014年 / 22卷 / 23期

基金：

新加坡国家研究基金会;

关键词：

NANOPARTICLES;

D O I：

10.1364/OE.22.029161

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report that reference objects, strong scatterers neighboring weak phase objects, enhance the phase retrieval and spatial resolution in coherent x-ray diffraction imaging (CDI). A CDI experiment with Au nano-particles exhibited that the reference objects amplified the signal-to-noise ratio in the diffraction intensity at large diffraction angles, which significantly enhanced the image resolution. The interference between the diffracted x-ray from reference objects and a specimen also improved the retrieval of the phase of the diffraction signal. The enhancement was applied to image NiO nano-particles and a mitochondrion and confirmed in a simulation with a bacteria phantom. We expect that the proposed method will be of great help in imaging weakly scattering soft matters using coherent x-ray sources including x-ray free electron lasers. (C) 2014 Optical Society of America

引用

页码：29161 / 29169

页数：9

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