Modulation of alternating electric field inside photoexcited carbon nanotubes

Modulation of alternating electric field inside photoexcited carbon nanotubes
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光激发碳纳米管内部交变电场的调制

DOI:
10.1063/1.3196317
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发表时间:
2009-08
影响因子:
4
通讯作者:
Miyamoto, Yoshiyuki
Miyamoto, Yoshiyuki
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Zhang, Hong;Miyamoto, Yoshiyuki

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研究了极化方向垂直于管轴的半导体碳纳米管(CNTs)内部交变电场(E-场)的调制。应用第一性原理含时密度泛函理论研究了碳纳米管中电子波函数和原子的实时动力学行为。碳纳米管内部的电场没有被完全屏蔽,实际上根据频率而增强。这种增强是由于振荡电子云的振幅随着共振频率的增加而增加。这一发现提供了一个清晰的洞察到的光学响应的碳纳米管和封装在碳纳米管的分子。
Modulation of an alternating electric field (E-field) inside semiconducting carbon nanotubes (CNTs) has been studied with polarization perpendicular to the tube axis. The real-time dynamics of the electron wave functions and atoms in the CNTs was investigated by applying first-principles time-dependent density functional theory. The E-field inside the CNTs was not screened completely and was actually enhanced depending on the frequency. The enhancement was due to the increasing amplitude of the oscillating electron cloud with the resonant frequency. This finding provides a clear insight into the optical response of CNTs and also of molecules encapsulated in CNTs.
DOI: 10.1016/0009-2614(92)85410-c
发表时间: 1992-04
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发表时间: --
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