Laser & Optoelectronics Progress, Volume. 56, Issue 3, 033003(2019)
Spectroscopic Modulation of Coherent Lattice Vibrations in One-Dimensional Single-Walled Carbon Nanotubes
A 3.7 fs pulsed laser is used to selectively pump the two lowest electronic transitions of semiconducting single-walled carbon nanotubes, which induces a low-frequency oscillation radial breathing mode (RBM) and a high-frequency oscillation axis stretching mode (GM) along the carbon tubes. By changing the pump bandwidth, the pump effects of the lowest single-excited-state and dual-excited-state on the amplitudes and initial phases of the two vibrational modes are detected. The research result indicates that the amplitudes of RBM and GM, as well as the initial phase of GM, are obviously modulated. With the influence of coherent electro-phonon coupling on phonon field, the parameters of the vibrational modes of the carbon nanotubes lattice structure are modulated. This provides a possibility to regulate the coherent lattice vibration properties by inducing the electronic coherent motion.
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Xin Zhao, Zhaogang Nie, Fangteng Zhang, Lin Ma, Deqiang Guo, Weiren Zhao, Huawei Xu, Kobayashi Takayoshi. Spectroscopic Modulation of Coherent Lattice Vibrations in One-Dimensional Single-Walled Carbon Nanotubes[J]. Laser & Optoelectronics Progress, 2019, 56(3): 033003
Category: Spectroscopy
Received: Jul. 23, 2018
Accepted: Aug. 13, 2018
Published Online: Jul. 31, 2019
The Author Email: Nie Zhaogang (zgnie@gdut.edu.cn)