1. Upconversion single-microbelt photodetector via two-photon absorption simultaneous
- Author
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Jinyu Li, Zhiren Qiu, Yuhao Ren, Zhiyang Chen, Yanyan Wu, Yunfeng Liang, Zikang Tang, Anqi Chen, Xuchun Gui, Guanlin Lou, Shi C Su, Dingyong Zhong, and Hai Zhu
- Subjects
010302 applied physics ,Fabrication ,Materials science ,Acoustics and Ultrasonics ,business.industry ,Detector ,Photodetector ,02 engineering and technology ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,Two-photon absorption ,Photon upconversion ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,law.invention ,Responsivity ,law ,0103 physical sciences ,Solar cell ,Optoelectronics ,0210 nano-technology ,business ,Absorption (electromagnetic radiation) - Abstract
Single microbelt (MB) photodetectors with metal–semiconductor-metal structure have been demonstrated and characterized comprehensively. For single-photon absorption, the maximum responsivity of ZnO-MB photodetector can reach as high as 1.4 × 105 A W−1 at 20 V bias. The results about photoresponse of MB-detector reveals that two relaxation mechanisms contribute to the carrier decay time. Moreover, the two-photon absorption upconversion photoresponsivity in the single-MB detector has also been realized, which is the first report about the two-photon absorption detector to the best of our knowledge. The excellent two-photon absorption photoresponsivity characteristic of the MB device can be available not only for detector but also for solar cell and biomedical imaging. The above results present a significant step towards future fabrication of single micro/nano-structure based multiphoton excitation optoelectronic devices.
- Published
- 2018
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