Molecular harmonic generation in bowtie-shaped nanostructure
文献类型：期刊论文
| 作者 | Liu, Hang1,2; Feng, Li-Qiang2,3; Li, Yi2 |
| 刊名 | LASER PHYSICS
 |
| 出版日期 | 2017-05-01 |
| 卷号 | 27期号:5 |
| 关键词 | Molecular High-order Harmonic Generation Spatial Positions Of H-2(+) Nonhomogeneous Field Bowtie-shaped Nanostructure |
| ISSN号 | 1054-660X |
| DOI | 10.1088/1555-6611/aa673b |
| 文献子类 | Article |
| 英文摘要 | Molecular high-order harmonic generation (MHHG) from H-2(+) in the bowtie-shaped nanostructure has been investigated. The results show that (i) due to the surface plasmon polaritons in the bowtie-shaped nanostructure, the laser intensity can be enhanced and present the nonhomogeneous effect in space. As a result, the extension of the harmonic cutoff can be achieved when the position of H-2(+) is injected away from the gap center of the nanostructure. However, due to the limited gap size of the nanostructure, the inherent threshold value of the harmonic cutoff can be found. (ii) Due to the asymmetric enhancement of the laser intensity in space, the extended higher harmonics come from E(t) > 0 or E(t) < 0 for the cases of the positive or the negative injected positions of H-2(+), respectively. (iii) In the few-cycle pulse, the extended higher harmonics mainly comes from the multi-photon resonance ionization (MPRI) around R = 4.0 and R = 4.5 but from only one harmonic emission event (HEE), thus leading to the intensity difference of the extended higher harmonics from the positive and the negative positions of H-2(+). In the multi-cycle pulse, the extended higher harmonics are also attributed to the MPRI but from R = 3.5 to R = 6.0 and there are three HEEs contributed to the extended higher harmonics, thus leading to the similar intensity of the extended higher harmonics from the positive and the negative positions of H-2(+). (iv) Due to the slower nuclear motion of the heavy nuclei, the intensities of the harmonics from T-2(+) are lower than those from H-2(+). (v) The contributions of the MHHG from the two-H nuclei show that when E(t) > 0 or E(t) < 0, the left-H or the right-H plays the dominating role in the MHHG. Moreover, as H-2(+) moves away from the gap center, the intensity difference of the higher harmonics from the two-H nuclei can be enhanced. But, it can be decreased as the pulse duration increases. |
| WOS关键词 | INTENSE LASER FIELDS ; ATTOSECOND PULSE ; ENHANCEMENT ; IONIZATION ; H-2(+) |
| WOS研究方向 | Optics ; Physics |
| 语种 | 英语 |
| WOS记录号 | WOS:000398264300001 |
| 出版者 | IOP PUBLISHING LTD |
| 源URL | [http://cas-ir.dicp.ac.cn/handle/321008/169324]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 通讯作者 | Feng, Li-Qiang |
| 作者单位 | 1.Liaoning Univ Technol, Sch Chem & Environm Engn, Jinzhou 121000, Peoples R China 2.Liaoning Univ Technol, Modern Phys Lab, Jinzhou 121000, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Mol React Dynam, Dalian 116023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu, Hang,Feng, Li-Qiang,Li, Yi. Molecular harmonic generation in bowtie-shaped nanostructure[J]. LASER PHYSICS,2017,27(5). |
| APA | Liu, Hang,Feng, Li-Qiang,&Li, Yi.(2017).Molecular harmonic generation in bowtie-shaped nanostructure.LASER PHYSICS,27(5). |
| MLA | Liu, Hang,et al."Molecular harmonic generation in bowtie-shaped nanostructure".LASER PHYSICS 27.5(2017). |
入库方式： OAI收割
来源：大连化学物理研究所
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