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Vibrational excitation of hydrogen molecules by two-photon absorption and third-harmonic generation
| Content Provider | Scilit |
|---|---|
| Author | Miyamoto, Yuki Hara, Hideaki Hiraki, Takahiro Masuda, Takahiko Sasao, Noboru Uetake, Satoshi Yoshimi, Akihiro Yoshimura, Koji Yoshimura, Motohiko |
| Copyright Year | 2017 |
| Description | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics We report the coherent excitation of the vibrational state of hydrogen molecules by two-photon absorption and the resultant third-harmonic generation (THG). Parahydrogen molecules cooled by liquid nitrogen are irradiated by mid-infrared nanosecond pulses at 4.8 μm with a nearly Fourier-transform-limited linewidth. The first excited vibrational state of parahydrogen is populated by two-photon absorption of the mid-infrared photons. Because of the narrow linewidth of the mid-infrared pulses, coherence between the ground and excited states is sufficient to induce higher-order processes. Near-infrared photons from the THG are observed at 1.6 μm. The dependence of the intensity of the near-infrared radiation on mid-infrared pulse energy, target pressure, and cell length is determined. We used a simple formula for THG with consideration of realistic experimental conditions to explain the observed results. |
| Related Links | http://iopscience.iop.org/article/10.1088/1361-6455/aa9782/pdf |
| ISSN | 09534075 |
| e-ISSN | 13616455 |
| DOI | 10.1088/1361-6455/aa9782 |
| Journal | Journal of Physics B: Atomic, Molecular and Optical Physics |
| Issue Number | 1 |
| Volume Number | 51 |
| Language | English |
| Publisher | IOP Publishing |
| Publisher Date | 2017-11-29 |
| Access Restriction | Open |
| Subject Keyword | Journal: Journal of Physics B: Atomic, Molecular and Optical Physics Two Photon Absorption |
| Content Type | Text |
| Resource Type | Article |
| Subject | Atomic and Molecular Physics, and Optics Condensed Matter Physics |
