Double quantum dot photoluminescence mediated by incoherent reversible energy transport

Article

关键词: PHONON BOTTLENECK;    RELAXATION;    NANOCRYSTALS;    LUMINESCENCE;    SCATTERING;   

DOI  :  10.1103/PhysRevB.81.245303

来源: SCIE

【 摘 要 】

We present a theoretical study of the stationary photoluminescence of two, direct-gap, semiconductor nano-crystals, taking into account electronic excitation energy-transfer processes due to electrostatic interaction. The results obtained here allow for the incoherent reversible energy transport that occurs when the intraband relaxation rate in a quantum dot acceptor is comparable to, or less than, the energy-transfer rate. We investigate the secondary emission of two different electronic level schemes that can be realized experimentally, obtain analytical expressions for the luminescence differential cross section, and perform an analysis of its spectrum. It is shown that when excitation is not in resonance with the levels involved in energy transfer, the energy transfer is more efficient.

【 授权许可】

Free