Directly Probing the Anisotropic Optical Emission of Individual ZnO Nanorods
文献类型：期刊论文
| 作者 | Gao, M ; Cheng, R ; Li, WL ; Li, YP ; Zhang, XX ; Xie, SS |
| 刊名 | JOURNAL OF PHYSICAL CHEMISTRY C
 |
| 出版日期 | 2010 |
| 卷号 | 114期号:25页码:11081 |
| 关键词 | WAVE-GUIDES NANOWIRE MULTICOLOR LASERS CAVITY |
| ISSN号 | 1932-7447 |
| 通讯作者 | Gao, M: Peking Univ, Key Lab Phys & Chem Nanodevices, Beijing 100871, Peoples R China. |
| 中文摘要 | We report on the anisotropic optical emission of individual ZnO nanorods directly measured by angular-resolved photoluminescence imaging and spectroscopy with independent excitation and detection optics. A reduced diameter at the subwavelength scale results in degraded waveguiding efficiency and more divergent emission at the top ends of individual ZnO nanorods grown by chemical vapor deposition. The near-band-edge (NBE) emission from the nanorod ends exhibits strong angular dependence in both emission intensity and spectral line shape. A continuous intensity increase and spectral red shift of the NBE emission have been observed as the detection direction varies from the radial direction to the axial direction. The pronounced red shift (>60 meV) is primarily attributed to the transition from free exciton (FX) emission to its 2LO phonon replica (FX-2LO) emission. Our results support an exciton-polariton model for the waveguiding behavior of ZnO nanorods and demonstrate the dominant role of the EX-2LO exciton-phonon interaction in the waveguiding process. We also show that the excitation angle has little influence on the NBE emission but can greatly modify the deep level emissions. |
| 收录类别 | SCI |
| 资助信息 | National Science Foundation of China [50702002, 60807016]; Ministry of Science and Technology [2006CB932401, 2005CB623602]; SRF for ROCS and SEM |
| 语种 | 英语 |
| 公开日期 | 2013-09-17 |
| 源URL | [http://ir.iphy.ac.cn/handle/311004/36102]  |
| 专题 | 物理研究所_物理所公开发表论文_物理所公开发表论文_期刊论文 |
| 推荐引用方式 GB/T 7714 | Gao, M,Cheng, R,Li, WL,et al. Directly Probing the Anisotropic Optical Emission of Individual ZnO Nanorods[J]. JOURNAL OF PHYSICAL CHEMISTRY C,2010,114(25):11081. |
| APA | Gao, M,Cheng, R,Li, WL,Li, YP,Zhang, XX,&Xie, SS.(2010).Directly Probing the Anisotropic Optical Emission of Individual ZnO Nanorods.JOURNAL OF PHYSICAL CHEMISTRY C,114(25),11081. |
| MLA | Gao, M,et al."Directly Probing the Anisotropic Optical Emission of Individual ZnO Nanorods".JOURNAL OF PHYSICAL CHEMISTRY C 114.25(2010):11081. |
入库方式： OAI收割
来源：物理研究所
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