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Upconversion single-microbelt photodetector via two-photon absorption simultaneous

Authors :
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
Hai Zhu
Source :
Journal of Physics D: Applied Physics. 51:19LT01
Publication Year :
2018
Publisher :
IOP Publishing, 2018.

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.

Details

ISSN :
13616463 and 00223727
Volume :
51
Database :
OpenAIRE
Journal :
Journal of Physics D: Applied Physics
Accession number :
edsair.doi...........8f0aa9afce3262cc020c7706eb3b181a
Full Text :
https://doi.org/10.1088/1361-6463/aaba6c