Optical control over two-dimensional lattice vibrational trajectories in crystalline quartz
Optical control over two-dimensional lattice vibrational trajectories in crystalline quartz
复制标题
对晶体石英中二维晶格振动轨迹的光学控制
DOI：
10.1063/1.476485
复制
发表时间：
1998
影响因子：
4.4
通讯作者：
K. Nelson
中科院分区：
文献类型：
--
作者：
M. M. Wefers;H. Kawashima;K. Nelson
本文研究了石英晶体中简并E对称光学声子模的二维振动轨迹控制。不同偏振的超短光脉冲对用于通过脉冲受激拉曼散射沿简并模的沿着正交方向赋予动量。两个激励脉冲的时间间隔的变化允许选择各种线性、椭圆形或圆形轨迹。如果使用任意形状的激励波形，则更复杂的二维轨迹也是可能的。
Control over the trajectory of two-dimensional vibrational motion is demonstrated for a degenerate E-symmetry optic phonon mode in crystalline quartz. Pairs of ultrashort optical pulses of different polarizations are used to impart momentum along orthogonal directions of the degenerate mode through impulsive stimulated Raman scattering. Variation of the temporal separation of the two excitation pulses permits various linear, elliptical, or circular trajectories to be selected. More complex two-dimensional trajectories are also possible if arbitrarily shaped excitation waveforms are used.