Coherent optical phonons in glassy carbon

被引：1
|
作者：
Takagi, Itsuki [1 ,2 ]
Konno, Yuma [1 ,2 ]
Kimata, Tetsuya [1 ,3 ,4 ]
Nakamura, Kazutaka G. [1 ,2 ]
机构：
[1] Tokyo Inst Technol, Inst Innovat Res, Lab Mat & Struct, 4259 Nagatsuta, Yokohama 2268503, Japan
[2] Tokyo Inst Technol, Dept Mat Sci & Engn, 4259 Nagatsuta, Yokohama 2268503, Japan
[3] Natl Inst Quantum Sci & Technol QST, Takasaki Adv Radiat Res Inst, 1233 Watanuki, Takasaki, Gunma 3701292, Japan
[4] Minist Def ATLA, Ground Syst Res Ctr, 2-9-54 Fuchinobe, Sagamihara 2520206, Japan
来源：
CARBON | 2023年 / 204卷
关键词：
Glassy carbon; Coherent phonons; Transient reflection measurements; Pump-probe spectroscopy; Raman spectroscopy; RAMAN-SPECTROSCOPY; DYNAMICS; SCATTERING;
D O I：
10.1016/j.carbon.2022.12.049
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this work, coherent phonons in glassy carbon using transient reflection measurements with the pump-probe spectroscopy are investigated. Detection of coherent oscillation of optical phonons in a polished glassy carbon sample is enabled by wavelength-selected measurements for reflected probe pulse. We demonstrate that the G and D mode oscillations occur at 46.8 and 38.2 THz frequency, respectively, and have approximately the same lifetime of 0.17 ps. Furthermore, we find that the D mode peak is anisotropic and spreads towards lower energies.
引用
收藏
页码：191 / 195
页数：5
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