Transient Bloch oscillation with the symmetry-governed phase in semiconductor superlattices
Transient Bloch oscillation with the symmetry-governed phase in semiconductor superlattices
复制标题
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
复制
发表时间:
2010
影响因子:
3.7
通讯作者:
K. Hirakawa
中科院分区:
文献类型:
--
作者:
T. Unuma;Y. Ino;M. Kuwata;G. Bastard;K. Hirakawa
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.
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
影响因子:
3.2
作者:
Vartiainen, EM;Ino, Y;Peiponen, KE
通讯作者:
Peiponen, KE