Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering

doi:10.1088/1674-1056/20/12/126301

中国物理B ›› 2011, Vol. 20 ›› Issue (12): 126301-126301.doi: 10.1088/1674-1056/20/12/126301

Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering

张明福¹, 韩杰才¹, 何兴², 孟庆琨², 宋云飞², 杨延强², 杜鑫³

(1)Centre for Composite Materials, Harbin Institute of Technology, Harbin 150080, China; (2)Centre for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, China; (3)Centre for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, China;College of Foundation Science, Harbin University of Commerce, Harbin 150028, China

收稿日期:2011-02-26 修回日期:2011-06-14 出版日期:2011-12-15 发布日期:2011-12-15
基金资助:
Project supported by the National Natural Science Foundation of China (Grant No. 20973050).

Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering

Du Xin(杜鑫)^a)b), Zhang Ming-Fu(张明福)^c), He Xing(何兴)^a), Meng Qing-Kun(孟庆琨)^a), Song Yun-Fei(宋云飞)^a), Yang Yan-Qiang(杨延强)^a)^†, and Han Jie-Cai(韩杰才)^c)

^a Centre for Condensed Matter Science and Technology, Department of Physics, Harbin Institute of Technology, Harbin 150080, China; ^b College of Foundation Science, Harbin University of Commerce, Harbin 150028, China; ^c Centre for Composite Materials, Harbin Institute of Technology, Harbin 150080, China

Received:2011-02-26 Revised:2011-06-14 Online:2011-12-15 Published:2011-12-15
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 20973050).

摘要/Abstract

摘要： We report on the theoretical and the experimental investigations of the coherent phonon dynamics in sapphire crystal using the femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) technique. The temporal chirped white-light continuum (WLC) is used for the Stokes pulse, therefore we can perform the selective excitation of the phonon modes without using a complicated laser system. The expected quantum beat phenomenon is clearly observed. The theoretical formulas consist very well with the experimental results. The dephasing times of the excited phonon modes, the wavenumber difference, and the phase shift between the simultaneously excited modes are obtained and discussed. This work opens up a way to study directly high-frequency coherent phonon dynamics in bulk crystals on a femtosecond time scale and is especially helpful for understanding the nature of coherent phonons.

关键词: coherent phonon, femtosecond time-resolved coherent anti-Stokes Raman scattering, dephasing, quantum beat

Abstract: We report on the theoretical and the experimental investigations of the coherent phonon dynamics in sapphire crystal using the femtosecond time-resolved coherent anti-Stokes Raman scattering (fs-CARS) technique. The temporal chirped white-light continuum (WLC) is used for the Stokes pulse, therefore we can perform the selective excitation of the phonon modes without using a complicated laser system. The expected quantum beat phenomenon is clearly observed. The theoretical formulas consist very well with the experimental results. The dephasing times of the excited phonon modes, the wavenumber difference, and the phase shift between the simultaneously excited modes are obtained and discussed. This work opens up a way to study directly high-frequency coherent phonon dynamics in bulk crystals on a femtosecond time scale and is especially helpful for understanding the nature of coherent phonons.

Key words: coherent phonon, femtosecond time-resolved coherent anti-Stokes Raman scattering, dephasing, quantum beat

中图分类号: (Phonons in crystal lattices)

63.20.-e

42.65.Dr (Stimulated Raman scattering; CARS) 42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency) 78.47.jh (Coherent nonlinear optical spectroscopy)

杜鑫, 张明福, 何兴, 孟庆琨, 宋云飞, 杨延强, 韩杰才. Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering[J]. 中国物理B, 2011, 20(12): 126301-126301.

Du Xin(杜鑫), Zhang Ming-Fu(张明福), He Xing(何兴), Meng Qing-Kun(孟庆琨), Song Yun-Fei(宋云飞), Yang Yan-Qiang(杨延强), and Han Jie-Cai(韩杰才) . Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering[J]. Chin. Phys. B, 2011, 20(12): 126301-126301.

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Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering

Theoretical and experimental investigations of coherent phonon dynamics in sapphire crystal using femto- second time-resolved coherent anti-Stokes Raman scattering

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