Dynamic carrier distribution in quantum wells modulated by surface acoustic waves
Dynamic carrier distribution in quantum wells modulated by surface acoustic waves
复制标题
表面声波调制量子阱中的动态载流子分布
DOI：
10.1103/physrevb.64.041304
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发表时间：
2001
影响因子：
3.7
通讯作者：
A. Cantarero
中科院分区：
文献类型：
--
作者：
F. Alsina;P. Santos;R. Hey;A. García;A. Cantarero
利用空间和时间分辨光致发光技术研究了表面声波（SAW）场下砷化镓量子阱中光生载流子的动力学。在声表面波作用下PL振荡的频率和相位可以得到有关载流子分布和由声表面波引起的带隙调制的信息。我们直接证明了载流子的输运性质最终控制了它们在调制电位中的分布、储存和随后的重组。
We have investigated the dynamics of photogenerated carriers under surface acoustic wave (SAW) fields in GaAs quantum wells using spatially and time-resolved photoluminescence (PL). The frequency and phase of the PL oscillations under a SAW yield information about the carrier distribution and the band-gap modulation induced by the SAW. We directly prove that the transport properties of the carriers ultimately control their distribution, storage and, subsequent recombination in the modulated potential.