Coherent control of 40-THz optical phonons in diamond using femtosecond optical pulses
Coherent control of 40-THz optical phonons in diamond using femtosecond optical pulses
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DOI：
10.1103/physrevb.101.174301
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发表时间：
2020-05-04
影响因子：
3.7
通讯作者：
Nakamura，Kazutaka G.
中科院分区：
文献类型：
--
作者：
Kimata，Tetsuya;Yoda，Kazuma;Nakamura，Kazutaka G.
修正了双脉冲激发相干控制光学声子的理论，用于计算金刚石等大失谐情况;我们计算了光学声子的振幅，而不使用行波近似。此外，我们考虑了频率啁啾和非高斯脉冲形状。利用泵浦-泵浦延迟为~ 120 fs的红外激光脉冲对，研究了金刚石中40 THz光学声子振幅的相干控制，并利用修正的理论进行了分析。
A theory of the coherent control of optical phonons by double-pulse excitation was modified for the calculation of a large detuning case such as diamond; we calculated the amplitude of the optical phonons without using a rotating-wave approximation. Additionally, we took the frequency chirping and non-Gaussian pulse shape into consideration. The coherent control of the amplitude of 40 THz optical phonons in diamond was demonstrated by using a pair of infrared pulses at a pump-pump delay betweenand 120 fs, and analyzed by using the modified theory.