A tabletop experimental system for investigating ultrafast atomic dynamics based on femtosecond extreme ultraviolet photons
文献类型：期刊论文
| 作者 | Hai Bang2,3; Zhang Shao-Feng3 ; Zhang Min2,3; Dong Da-Pu2,3; Lei Jian-Ting1; Zhao Dong-Mei3; Ma Xin-Wen3
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| 刊名 | ACTA PHYSICA SINICA
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| 出版日期 | 2020-12-05 |
| 卷号 | 69期号:23页码:8 |
| 关键词 | extreme ultraviolet (XUV) photon source high order harmonic generation (HHG) conical diffraction reaction microscope |
| ISSN号 | 1000-3290 |
| DOI | 10.7498/aps.69.20201035 |
| 通讯作者 | Zhang Shao-Feng(zhangshf@impcas.ac.cn) ; Ma Xin-Wen(x.ma@impcas.ac.cn) |
| 英文摘要 | Femtosecond extreme ultraviolet (XUV) light pulses play an important role in investigating the ultrafast dynamics of atoms and molecules, and are complementary to the conventional large facilities like synchrotron radiation and free electron laser. We build a table-top femtosecond extreme ultraviolet light source based on the high-order harmonic generation (HHG) process of gaseous medium in a strong laser field. We implement HHG by focusing an intense IR laser into a 5 cm long gas-filled hollow waveguide, instead of the conventional tightly focusing geometry with gas jet. Inside the waveguide, the laser peak intensity is nearly constant and the gas pressure is well-controlled, making it possible to maintain the phase matching condition over an extended distance. And a fully coherent high harmonic beam builds up along the waveguide, leading to a dramatically higher HHG efficiency. Monochromatic XUV light pulses are obtained by spectral selection of the HHG through employing the conical diffraction method of grating. With this geometry used, the pulse broadening caused by wave front tilting during the diffraction can be strongly suppressed, especially for the case of grazing incidence. And the femtosecond temporal character of the light pulse can be preserved while keeping a high reflectivity. The temporal broadening of the XUV light pulse in our setup is estimated to be within 100 femtosecond. By using different noble gases, photons with energy values ranging from 20 eV to 90 eV are produced. For the 27th-order harmonic centered at 41.9 eV, the flux is measured to be 1 x 10(10) photons per second, with an energy spread of 0.4 eV. In order to investigate the ultrafast dynamic behaviors of gaseous atoms and molecules with an HHG-based XUV source, we develop a reaction microscope with ultrahigh vacuum of about 10(-11) mbar. The combination of HHG-based XUV with the newly developed reaction microscope provides a unique tool for studying the XUV photon and atom/molecule interaction. A series of experiments has been successfully carried out on the platform and the system shows good performance. |
| WOS关键词 | GENERATION |
| 资助项目 | National Basic Research Program of China[2017YFA0402300] ; National Natural Science Foundation of China[11934004] |
| WOS研究方向 | Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000596858800018 |
| 出版者 | CHINESE PHYSICAL SOC |
| 资助机构 | National Basic Research Program of China ; National Natural Science Foundation of China |
| 源URL | [http://119.78.100.186/handle/113462/138453]  |
| 专题 | 中国科学院近代物理研究所 |
| 通讯作者 | Zhang Shao-Feng; Ma Xin-Wen |
| 作者单位 | 1.Lanzhou Univ, Sch Nucl Sci & Technol, Lanzhou 730000, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Modern Phys, Lanzhou 730000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hai Bang,Zhang Shao-Feng,Zhang Min,et al. A tabletop experimental system for investigating ultrafast atomic dynamics based on femtosecond extreme ultraviolet photons[J]. ACTA PHYSICA SINICA,2020,69(23):8. |
| APA | Hai Bang.,Zhang Shao-Feng.,Zhang Min.,Dong Da-Pu.,Lei Jian-Ting.,...&Ma Xin-Wen.(2020).A tabletop experimental system for investigating ultrafast atomic dynamics based on femtosecond extreme ultraviolet photons.ACTA PHYSICA SINICA,69(23),8. |
| MLA | Hai Bang,et al."A tabletop experimental system for investigating ultrafast atomic dynamics based on femtosecond extreme ultraviolet photons".ACTA PHYSICA SINICA 69.23(2020):8. |
入库方式： OAI收割
来源：近代物理研究所
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