Tailoring exciton dynamics by elastic strain-gradient in semiconductors.
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.
State Key Laboratory for Mesoscopic Physics and Electron Microscopy Laboratory, School of Physics, Peking University, and Collaborative Innovation Center of Quantum Matter, Beijing, 100871, China.
Xuewen
X
Fu
Cong
C
Su
Qiang
Q
Fu
Xinli
X
Zhu
Rui
R
Zhu
Chuanpu
C
Liu
Zhimin
Z
Liao
Jun
J
Xu
Wanlin
W
Guo
Ji
J
Feng
Ju
J
Li
Dapeng
D
Yu
ZnO microwire; cathodoluminescence; exciton dynamics; pure bending; strain-gradient