Coherent exciton dynamics in nanocrystal chain arrays

被引:6
作者
Hong, Suc-Kyoung [1 ]
Nam, Seog Woo
Yeon, Kyu-Hwang
机构
[1] Korea Univ, Dept Display & Semicond Phys, Jochiwon 339700, Chungnam, South Korea
[2] Chungbuk Natl Univ, Coll Nat Sci, Dept Phys, Cheonju 361763, Chungbuk, South Korea
来源
PHYSICAL REVIEW B | 2007年 / 76卷 / 03期
关键词
QUANTUM ELECTRODYNAMICS; ENERGY-TRANSFER;
D O I
10.1103/PhysRevB.76.035321
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Exciton dynamics, eigenstates, and eigenenergies of nanochains consisting of closely spaced nanocrystals (NC's) are studied with a simple resonant energy transfer model. The simple NC chains considered are a linear chain, a circular chain, and a chain with a ring. The eigen-wave-functions and eigenenergies are obtained for the NC chains, and the exciton population dynamics in each system is analyzed by obtaining the diagonal elements of the density matrix for a specified initial excitation of an NC. The correlation between opposite NC's in the ring of the NC chain with a ring is considered, as well. In the NC nanochains with the resonant energy transfer model, the energy transfer via resonance dipole-dipole interaction generates propagating exciton waves which interfere with each other.
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页数:9
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