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Tailoring Exciton Dynamics by Elastic Strain‐Gradient in Semiconductors
Author(s) -
Fu Xuewen,
Su Cong,
Fu Qiang,
Zhu Xinli,
Zhu Rui,
Liu Chuanpu,
Liao Zhimin,
Xu Jun,
Guo Wanlin,
Feng Ji,
Li Ju,
Yu Dapeng
Publication year - 2014
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201305058
Subject(s) - exciton , cathodoluminescence , bent molecular geometry , materials science , strain (injury) , field (mathematics) , condensed matter physics , nanotechnology , composite material , physics , optoelectronics , luminescence , mathematics , medicine , pure mathematics
In purely bent ZnO microwires , the excitons can be effectively driven and concentrated by the elastic strain‐gradient towards the tensile outer side of the purely bent wire. Experimental and theoretical approaches are combined to investigate the dynamics of excitons in an inhomogeneous strain field with a uniform elastic strain‐gradient. Cathodoluminescence spectroscopy analysis on purely bent ZnO microwires verifies that excitons can be effectively driven and concentrated along the elastic strain‐gradient.