Transient Bloch oscillation with the symmetry-governed phase in semiconductor superlattices

Transient Bloch oscillation with the symmetry-governed phase in semiconductor superlattices
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半导体超晶格中具有对称控制相位的瞬态布洛赫振荡

DOI:
10.1103/physrevb.81.125329
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发表时间:
2010
期刊:
影响因子:
3.7
通讯作者:
K. Hirakawa
K. Hirakawa
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
T. Unuma;Y. Ino;M. Kuwata;G. Bastard;K. Hirakawa

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我们研究了飞秒激光脉冲产生的不同初始电子分布的半导体超晶格最低能带中电子输运的时间演化。结果表明,布洛赫振荡电子的瞬态运动产生的太赫兹波对泵浦光子能量不敏感,电流从最大值开始衰减为$\text{cos}\text{ }{\ensurmath {\omega}}_{B}t$(${\ensurmath {\omega}}_{B}$:布洛赫频率),与半经典微带输运的预期相反.我们表明,Wannier-Stark阶梯上的对称电子分布是必不可少的观察到的独特的振荡相位。
We have investigated the time evolution of electron transport in the lowest miniband of semiconductor superlattices for various initial electron distributions created by femtosecond laser pulses. It is found that the terahertz wave forms emitted by the transient motion of Bloch oscillating electrons are insensitive to the pump photon energy and that the current starts from its maximum as damped $\text{cos}\text{ }{\ensuremath{\omega}}_{B}t$ (${\ensuremath{\omega}}_{B}$: Bloch frequency), in contrast to the expectation from semiclassical miniband transport. We show that the translationally symmetric electron distribution on the Wannier-Stark ladder is essential for the observed unique oscillation phase.
半导体超晶格的布洛赫增益
DOI: --
发表时间: 2004
期刊: Kotai Butsuri vol.39 No.2
影响因子: --
作者:
N.Sekine;Y.Shimada;K.Hirakawa
通讯作者: K.Hirakawa
DOI: 10.1063/1.1786345
发表时间: 2004-10-15
影响因子: 3.2
作者:
Vartiainen, EM;Ino, Y;Peiponen, KE
通讯作者: Peiponen, KE