Quantum beat of heavy-hole and light-hole excitons originating from interband Stark-ladder transitions in a biased GaAs/AlAs superlattice

被引：0
|
作者：
Hasegawa, Takayuki [1 ]
机构：
[1] Osaka Inst Technol, Fac Engn, Asahi ku, Osaka 5358585, Japan
来源：
APPLIED PHYSICS EXPRESS | 2023年 / 16卷 / 02期
关键词：
quantum beat; Bloch oscillation; stark-ladder transition; superlattice; ultrafast spectroscopy; BLOCH OSCILLATIONS; ELECTRIC-FIELD; SEMICONDUCTOR; LOCALIZATION; EMISSION;
D O I：
10.35848/1882-0786/acb9d2
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The letter reports the quantum beat of heavy-hole (HH) and light-hole (LH) excitons originating from interband Stark-ladder transitions in a GaAs/AlAs superlattice. Under the condition that the pump photon energy was well below the LH-related transition energy, only Bloch oscillation was observed. As the pump photon energy was increased, another oscillatory signal with a frequency of similar to 6 THz was superimposed. The calculation considering related transitions indicates that the oscillation is due to the quantum beat of HH and LH excitons originating from the interband Stark-ladder transitions between the hole states and the electron state in the first-nearest-neighbor quantum wells.
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页数：4
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