論文

査読有り
2018年1月

Vibrational excitation of hydrogen molecules by two-photon absorption and third-harmonic generation

JOURNAL OF PHYSICS B-ATOMIC MOLECULAR AND OPTICAL PHYSICS
  • Yuki Miyamoto
  • ,
  • Hideaki Hara
  • ,
  • Takahiro Hiraki
  • ,
  • Takahiko Masuda
  • ,
  • Noboru Sasao
  • ,
  • Satoshi Uetake
  • ,
  • Akihiro Yoshimi
  • ,
  • Koji Yoshimura
  • ,
  • Motohiko Yoshimura

51
1
記述言語
英語
掲載種別
研究論文(学術雑誌)
DOI
10.1088/1361-6455/aa9782
出版者・発行元
IOP PUBLISHING LTD

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 mu m 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 mu m. 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.

Web of Science ® 被引用回数 : 3

リンク情報
DOI
https://doi.org/10.1088/1361-6455/aa9782
Web of Science
https://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=JSTA_CEL&SrcApp=J_Gate_JST&DestLinkType=FullRecord&KeyUT=WOS:000417515900001&DestApp=WOS_CPL

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