Article Title

Synergistic graphene/aluminum surface plasmon coupling for zinc oxide lasing improvement

Authors

Qiuxiang Zhu, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China College of Communication and Electronic Engineering, Hunan City University, Yiyang 413000, China
Feifei Qin, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China
Junfeng Lu, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China
Zhu Zhu, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China
Haiyan Nan, Department of Physics, Southeast University, Nanjing 210096, China
Zengliang Shi, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China
Zhenhua Ni, Department of Physics, Southeast University, Nanjing 210096, China
Chunxiang Xu, State Key Laboratory of Bioelectronics, School of Biological Science & Medical Engineering, Southeast University, Nanjing 210096, China

Keywords

ZnO microrod, Al nanoparticles, graphene, surface plasmons, energy coupling

Abstract

ABSTRACT Collective oscillations of free electrons generate plasmons on the surface of a material. A whispering-gallery microcavity effectively confines the light field on its surface based on the total reflection from its internal wall. When these two kinds of electromagnetic waves meet each other, the stimulated emissions from an individual ZnO microrod were enhanced more than 50-fold and the threshold was reduced after the whispering-gallery microcavity was coated with a monolayer of graphene and Al nanoparticles. The improvement of the lasing performance was attributed to the synergistic energy coupling of the graphene/Al surface plasmons with ZnO excitons. The lasing characteristics and the coupling mechanism were investigated systematically.

Graphical Abstract

DOI

https://doi.org/10.1007/s12274-016-1387-0

Publisher

Tsinghua University Press

Recommended Citation

Qiuxiang Zhu,Feifei Qin,Junfeng Lu,Zhu Zhu,Haiyan Nan,Zengliang Shi,Zhenhua Ni,Chunxiang Xu, Synergistic graphene/aluminum surface plasmon coupling for zinc oxide lasing improvement. NanoRes.2017, 10(6): 1996–2004