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Subwavelength Fourier-transform imaging without a lens or a beamsplitter

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
时间：0
分类：O174.22[理学—数学;理学—基础数学] O435[机械工程—光学工程;理学—光学;理学—物理]
作者机构：[1]MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter, Department of Applied Physics, Xi' an Jiaotong University, Xi' an 710049, China
相关基金：Project supported by the Fundamental Research Funds for the Central Universities of China, the Special Prophase Project on the National Basic Research Program of China （Grant No. 2011CB311807）, the National Basic Research Program of China （Grant No. 2010CB923102）, and the National Natural Science Foundation of China （Grant Nos. 11004158, 11074198, and 11074199）.

作者：刘瑞丰[1], 袁新星[1], 方一珍[1], 张沛[1], 周宇[1], 高宏[1], 李福利[1]

关键词：傅里叶变换, 成像过程, 无透镜, 分束器, 亚波长, CCD数据, 菲涅耳衍射区, 电荷耦合器件, thermal light, Fourier imaging, intensity correlation

中文摘要：

The fourier-transform patterns of an object are usually observed in the far-field region or obtained in the near-field region with the help of lenses. Here we propose and experimentally demonstrate a scheme of Fourier-transform patterns in the Fresnel diffraction region with thermal light. In this scheme, neither a lens nor a beamsplitter is used, and only one single charge coupled device(CCD) is employed. It means that dividing one beam out of a light source into signal and reference beams is not as necessary as the one done by the use of a beamsplitter in usual ghost interference experiments.Moreover, the coincidence measurement of two point detectors is not necessary and data recorded on a single CCD are sufficient for reconstructing the ghost diffraction patterns. The feature of the scheme promises a great potential application in the fields of X-ray and neutron diffraction imaging processes.

英文摘要：

The fourier-transform patterns of an object are usually observed in the far-field region or obtained in the near-field region with the help of lenses. Here we propose and experimentally demonstrate a scheme of Fourier-transform patterns in the Fresnel diffraction region with thermal light. In this scheme, neither a lens nor a bearnsplitter is used, and only one single charge coupled device （CCD） is employed. It means that dividing one beam out of a light source into signal and reference beams is not as necessary as the one done by the use of a beamsplitter in usual ghost interference experiments. Moreover, the coincidence measurement of two point detectors is not necessary and data recorded on a single CCD are sufficient for reconstructing the ghost diffraction patterns. The feature of the scheme promises a great potential application in the fields of X-ray and neutron diffraction imaging processes.

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