Multiphoton route to ZnO nanowire lasers.
With intense femtosecond laser excitation, multiphoton absorption-induced stimulated emission and laser emission in ZnO bulk crystal and nanowires have been demonstrated at room temperature. UV-stimulated emission peaks appeared in both bulk crystal and nanowires when the excitation exceeded certain thresholds, and a sharp lasing peak with a linewidth of ~0.5 nm was observed from ZnO nanowires. The emission properties were attributed to the band-edge emission of the recombination of carriers excited by two- and three-photon absorption processes in the wide-bandgap semiconductor.
Zhang
C F
CF
State Key Laboratory for Applied Surface Physics and Department of Physics, Fudan University, Shanghai, China.
Dong
Z W
ZW
You
G J
GJ
Qian
S X
SX
Deng
H
H