中国物理B ›› 2018, Vol. 27 ›› Issue (12): 123301-123301.doi: 10.1088/1674-1056/27/12/123301

• SPECIAL TOPIC—Recent advances in thermoelectric materials and devices • 上一篇    下一篇

Tracking coherent low frequency vibrational information of Rh101 in ground and excited electronic states by broadband transient grating spectroscopy

Wei Zhang(张伟), Xiao-Song Liu(刘小嵩), Zan-Hao Wang(王赞浩), Yun-Fei Song(宋云飞), Yan-Qiang Yang(杨延强)   

  1. 1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    2 National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
  • 收稿日期:2018-04-17 修回日期:2018-09-28 出版日期:2018-12-05 发布日期:2018-12-05
  • 通讯作者: Yan-Qiang Yang E-mail:yqyang@hit.edu.cn
  • 基金资助:

    Project supported by the Science Challenge Project, China (Grant No. TZ2016001) and the National Natural Science Foundation of China (Grant No. 21673211).

Tracking coherent low frequency vibrational information of Rh101 in ground and excited electronic states by broadband transient grating spectroscopy

Wei Zhang(张伟)1, Xiao-Song Liu(刘小嵩)1, Zan-Hao Wang(王赞浩)1, Yun-Fei Song(宋云飞)2, Yan-Qiang Yang(杨延强)1,2   

  1. 1 Department of Physics, Harbin Institute of Technology, Harbin 150001, China;
    2 National Key Laboratory of Shock Wave and Detonation Physics, Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang 621900, China
  • Received:2018-04-17 Revised:2018-09-28 Online:2018-12-05 Published:2018-12-05
  • Contact: Yan-Qiang Yang E-mail:yqyang@hit.edu.cn
  • Supported by:

    Project supported by the Science Challenge Project, China (Grant No. TZ2016001) and the National Natural Science Foundation of China (Grant No. 21673211).

摘要:

Time- and frequency-resolved broadband transient grating (BB-TG) spectroscopy is used to distinguish between ground- and excite-electronic state vibrational coherence at different wavelengths. Qualitative theoretical analysis using double-sided Feynman diagrams indicates that a superposition of ground and excited state vibrational coherence are contained in the ground state absorption (GSA) and stimulated emission (SE) overlap band, while only the excited state is contained in the excited state absorption (ESA) band. The TG experiment, in which a white light continuum (WLC) is adopted as a probe, is conducted with rhodamine101 (Rh101+) as the target molecule. Fourier analysis of TG dynamics in a positive delay time range at specific wavelengths enables us to distinguish the low-frequency vibrational modes of Rh101 in ground- and excite-electronic states.

关键词: transient grating, Rh101, low-frequency Raman, vibrational spectrum

Abstract:

Time- and frequency-resolved broadband transient grating (BB-TG) spectroscopy is used to distinguish between ground- and excite-electronic state vibrational coherence at different wavelengths. Qualitative theoretical analysis using double-sided Feynman diagrams indicates that a superposition of ground and excited state vibrational coherence are contained in the ground state absorption (GSA) and stimulated emission (SE) overlap band, while only the excited state is contained in the excited state absorption (ESA) band. The TG experiment, in which a white light continuum (WLC) is adopted as a probe, is conducted with rhodamine101 (Rh101+) as the target molecule. Fourier analysis of TG dynamics in a positive delay time range at specific wavelengths enables us to distinguish the low-frequency vibrational modes of Rh101 in ground- and excite-electronic states.

Key words: transient grating, Rh101, low-frequency Raman, vibrational spectrum

中图分类号:  (Rotation, vibration, and vibration-rotation constants)

  • 33.15.Mt
33.20.Tp (Vibrational analysis) 33.20.-t (Molecular spectra) 36.20.Ng (Vibrational and rotational structure, infrared and Raman spectra)