Coherent optical phonons in diamond
Coherent optical phonons in diamond
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DOI：
10.1063/1.2402231
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发表时间：
2006-12-04
影响因子：
4
通讯作者：
Petek, Hrvoje
中科院分区：
文献类型：
--
作者：
Ishioka, Kunie;Hase, Muneaki;Petek, Hrvoje
报道了单晶金刚石相干光学声子的飞秒动力学。亚10 fs，395 nm激光脉冲激发40太赫兹相干声子具有非常小的阻尼率（0.15 ps（-1））。在非共振激发条件下，声子振幅与功率的线性关系为电场驱动的产生机制提供了直接证据。尽管氮杂质在近紫外区有吸收，但其相干声子的产生被掺杂氮杂质显著抑制。本研究表明，一个简单的泵浦探测技术可以是一个强大的工具，用于评估超快相干电子和晶格动力学的金刚石材料。(c)2006年，美国物理学会。
The authors report femtosecond dynamics of the coherent optical phonon of single crystal diamond. Sub-10 fs, 395 nm laser pulses excite 40 THz coherent phonons with an extremely small damping rate (0.15 ps(-1)). Linear power dependence of the phonon amplitude under off-resonant excitation condition gives a direct evidence for an eletric-field-driven generation mechanism. The coherent phonon generation is noticeably suppressed by doping with nitrogen impurities, in spite of their absorption in the near ultraviolet. The present study demonstrates that a simple pump-probe technique can be a powerful tool for evaluating the ultrafast coherent electronic and lattice dynamics of diamond materials. (c) 2006 American Institute of Physics.