| CROSS-DISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY |
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Optical Field Confinement Enhanced Single ZnO Microrod UV Photodetector |
| Ming Wei, Chun-Xiang Xu**, Fei-Fei Qin, Arumugam Gowri Manohari, Jun-Feng Lu, Qiu-Xiang Zhu |
State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096
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Ming Wei, Chun-Xiang Xu, Fei-Fei Qin et al 2017 Chin. Phys. Lett. 34 078503 |
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Abstract ZnO microrods are synthesized using the vapor phase transport method, and the magnetron sputtering is used to decorate the Al nanoparticles (NPs) on a single ZnO microrod. The micro-PL and $I$–$V$ responses are measured before and after the decoration of Al NPs. The FDTD stimulation is also carried out to demonstrate the optical field distribution around the decoration of Al NPs on the surface of a ZnO microrod. Due to an implementation of Al NPs, the ZnO microrod exhibits an improved photoresponse behavior. In addition, Al NPs induced localized surface plasmons (LSPs) as well as improved optical field confinement can be ascribed to an enhancement of ultraviolet (UV) response. This research provides a method for improving the responsivity of photodetectors.
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Received: 27 March 2017
Published: 23 June 2017
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| PACS: |
85.60.Bt
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(Optoelectronic device characterization, design, and modeling)
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85.60.Gz
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(Photodetectors (including infrared and CCD detectors))
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78.67.-n
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(Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures)
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| Fund: Supported by the National Natural Science Foundation of China under Grant Nos 61475035 and 61275054, the Science and Technology Support Program of Jiangsu Province under Grant No BE2016177, and the Collaborative Innovation Center of Suzhou Nano Science and Technology. |
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