Quantum beat of excitons in spherical semiconductor quantum dots

This article reports a study on quantum beat of excitons in spherical semiconductor quantum dots. With renormalized wavefunction formulation for a three-level model including ground state level and two excited ones of exciton, quantum beat of excitons is observed to be twice the electron Rabi freque...

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Bibliographic Details
Published in:Superlattices and microstructures 2020-10, Vol.146, p.106675, Article 106675
Main Authors: Thao, Dinh Nhu, Bao, Le Thi Ngoc
Format: Article
Language:English
Subjects:
Exciton
Quantum beat
Rabi frequency
Semiconductor quantum dot
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Summary:This article reports a study on quantum beat of excitons in spherical semiconductor quantum dots. With renormalized wavefunction formulation for a three-level model including ground state level and two excited ones of exciton, quantum beat of excitons is observed to be twice the electron Rabi frequency while a strong resonant pump laser is connecting two exciton excited levels. In addition, dependences of characteristics of quantum beat of excitons on dot radius and pump laser detuning are examined. •Quantum beat of excitons is calculated in InGaAs/InAlAs spherical quantum dots.•Frequency of quantum beat is observed to be twice the electron Rabi frequency.•Dependences of beat characteristics on dot radius and laser detuning are examined.
ISSN:0749-6036
1096-3677
DOI:10.1016/j.spmi.2020.106675