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Electrically Pumped Fabry-Perot Microlasers From Single Ga-Doped ZnO Microbelt based Heterostructure Diodes


Semiconducting micro/nanostructures possessing naturally optical waveguiding behaviors and Fabry-Perot (F-P) like resonances are emerging as versatile building blocks for the assembly of photonic and optoelectronic devices, such as photodetectors, light-emitting diodes, lasers and so on. Individual ZnO micro/nanowires with rectangular cross-section, such as microwires, microbelts, possessing naturally smooth facets along both sides for good optical feedback, can be employed as an underlying F-P mode microcavity whilst as the gain medium for light amplification. In this context, electrically pumped F-P mode microlasers comprising single ZnO:Ga microbelt and p-GaN substrate have been realized. Being treated as the precondition, electrically driven exciton-polariton light-emitting behaviors was achieved from the heterojunction diodes, which could be ascribed to strong exciton-photon coupling and waveguided nature of the synthesized microbelts. Once the applied bias exceeded the threshold value, electrically pumped F-P mode lasing behaviors could be observed, the lasing peaks centered at 410.5 nm and 450.5 nm respectively, accompanied with a dramatic narrowing of the spectral line-width to be around 1.0 nm emerged on the waveguided emission spectrum. Therefore, the realization of electrically pumped F-P mode lasing using single microbelt based heterojunction diodes opens the door not only to the fabrication of coherent light sources and model systems for waveguided resonators, but also afford a competitive candidate to develop electrically pumped and ultralow threshold polariton lasers.

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Publication details

The article was received on 10 Jul 2018, accepted on 11 Sep 2018 and first published on 12 Sep 2018

Article type: Paper
DOI: 10.1039/C8NR05559A
Citation: Nanoscale, 2018, Accepted Manuscript
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    Electrically Pumped Fabry-Perot Microlasers From Single Ga-Doped ZnO Microbelt based Heterostructure Diodes

    M. Jiang, Z. Li, Y. Sun, Z. Zhang, B. Li, H. Zhao, C. Shan and D. Shen, Nanoscale, 2018, Accepted Manuscript , DOI: 10.1039/C8NR05559A

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