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一维单壁碳纳米管相干结构振荡的光谱学调制

Spectroscopic Modulation of Coherent Lattice Vibrations in One-Dimensional Single-Walled Carbon Nanotubes

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摘要

采用3.7 fs脉冲激光对半导体单壁碳纳米管的两个最低电子跃迁进行选择性抽运, 诱导产生了沿碳管径向振荡的低频呼吸模式(RBM)和沿轴向振荡的高频伸缩模式(GM)。通过变换抽运光带宽, 探测到最低单激发态抽运和双激发态抽运对两种声子振幅及初始相位的影响。研究结果表明, RBM和GM的振幅以及GM的初始相位得到了明显调制。基于相干电-声子耦合对声子场的影响, 调制了碳纳米管晶格结构振荡模式的参量。提供了一种通过激发电子相干运动调控相干晶格振荡特性的可能性。

Abstract

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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中图分类号:O433.1

DOI:10.3788/lop56.033003

所属栏目:激光器与激光光学

基金项目:国家自然科学基金(11774071, 11704079)、广州市科技创新发展专项资金(201804010451)

收稿日期:2018-07-23

修改稿日期:2018-08-08

网络出版日期:2018-08-13

作者单位    点击查看

赵欣:广东工业大学物理与光电工程学院, 广东 广州 510006
聂兆刚:广东工业大学物理与光电工程学院, 广东 广州 510006
张芳腾:广东工业大学物理与光电工程学院, 广东 广州 510006
马琳:广东工业大学物理与光电工程学院, 广东 广州 510006
郭德强:广东工业大学物理与光电工程学院, 广东 广州 510006
赵韦人:广东工业大学物理与光电工程学院, 广东 广州 510006
徐华伟:工业和信息化部电子第五研究所, 广东 广州 510507
Takayoshi Kobayashi:电気通信大学先进超快激光研究中心, 日本 东京 182-8585台湾交通大学电子物理系, 台湾 新竹 30010

联系人作者:聂兆刚(zgnie@gdut.edu.cn)

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引用该论文

Zhao Xin,Nie Zhaogang,Zhang Fangteng,Ma Lin,Guo Deqiang,Zhao Weiren,Xu Huawei,Takayoshi Kobayashi. Spectroscopic Modulation of Coherent Lattice Vibrations in One-Dimensional Single-Walled Carbon Nanotubes[J]. Laser & Optoelectronics Progress, 2019, 56(3): 033003

赵欣,聂兆刚,张芳腾,马琳,郭德强,赵韦人,徐华伟,Takayoshi Kobayashi. 一维单壁碳纳米管相干结构振荡的光谱学调制[J]. 激光与光电子学进展, 2019, 56(3): 033003

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