首页> 外文会议>2013 Conference on Lasers and Electro-Optics Europe amp; International Quantum Electronics Conference >Selctive detection of phonon-plasmon coupled oscillation in indium phosphide using a coherent control technique
【24h】

Selctive detection of phonon-plasmon coupled oscillation in indium phosphide using a coherent control technique

机译:使用相干控制技术选择性检测磷化铟中的声子-等离子体耦合振荡

获取原文
获取原文并翻译 | 示例

摘要

Coherent oscillations of phonons are excited by irradiation of a femtosecond laser pulse which duration is much shorter than those vibrational periods. Transient reflectivity shows modulation due to these coherent oscillations and gives dynamic information of phonons, known as time-domain spectroscopy (TDS). Furthermore, using a pair of femtoseconds laser pulses for excitation, amplitude of the coherent oscillations can be controlled by changing separation time between the pulses (coherent control technique) [1,2]. In polar semiconductors, coherent oscillations of phonon-plasmon coupled mode are also excited when the plasma frequency and the phonon frequency are similar. Dynamics of longitudinal optical (LO) phonons and LO-phonon-plasmon coupled (LOPC) oscillations have been studied using TDS [3]. However, the intensity of LOPC is too small and hidden under the LO-phonon oscillations. Then dynamical information of LOPC has not been obtained. In this paper, we detected the LOPC coherent oscillations in InP by suppressing the strong LO-phonon oscillations using the coherent control technique.
机译:飞秒激光脉冲的照射激发了声子的相干振荡,其持续时间比那些振动周期短得多。瞬态反射率显示出由于这些相干振荡而引起的调制,并提供了声子的动态信息,称为时域光谱(TDS)。此外,使用一对飞秒激光脉冲进行激发,可以通过改变脉冲之间的间隔时间来控制相干振荡的幅度(相干控制技术)[1,2]。在极性半导体中,当等离子体频率和声子频率相似时,也会激发声子-等离子体激元耦合模式的相干振荡。使用TDS研究了纵向光学(LO)声子和LO-声子-等离激元耦合(LOPC)振荡的动力学[3]。但是,LOPC的强度太小,隐藏在LO声子振荡下。然后,尚未获得LOPC的动态信息。在本文中,我们通过使用相干控制技术抑制了强烈的LO声子振荡,检测了InP中的LOPC相干振荡。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号