Jieying Kong

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Ultraviolet semiconductor lasers are widely used for applications in photonics, information storage, biology and medical therapeutics. Although the performance of gallium nitride ultraviolet lasers has improved significantly over the past decade, demand for lower costs, higher powers and shorter wavelengths has motivated interest in zinc oxide (ZnO), which(More)
p-type Sb-doped ZnO (ZnO:Sb)/n-type Ga-doped ZnO (ZnO:Ga) junctions were grown on c-plane sapphire substrates using plasma-assisted molecular-beam epitaxy. Mesa geometry light emitting diodes (LEDs) were fabricated using standard photolithography and lift-off process, with ohmic contacts achieved using Au/Ni and Au/Ti for top ZnO:Sb and bottom ZnO:Ga(More)
A diode with Sb-doped p-type ZnO, MgZnO/ZnO/MgZnO double heterostructure, and undoped n-type ZnO layers was grown on c-plane sapphire substrate by plasma-assisted molecular-beam epitaxy. Hall effect measurement showed that the top p-type Sb-doped ZnO layer has a hole concentration of 1 10cm . Mesa geometry light emitting diodes were fabricated with Au/Ni(More)
An electrically pumped random laser diode was fabricated with a MgZnO/ZnO/MgZnO double heterostructure embedded in a ZnO pn junction. Gain can be achieved at very low-threshold current owing to exciton processes. Light closed loops are formed by random multiple scattering on vertical column boundaries in the thin film. The tilted and rough mesa edge planes(More)
An optically pumped ZnO nanowire laser with a 10-period SiO2/SiNx distributed Bragg reflector (DBR) was demonstrated. Stimulated emissions with equally distributed Fabry–Pérot lasing modes were observed at pumping powers larger than 121 kW/cm2. This result, when compared to nanowires of the same length and without a DBR structure, shows that a lower(More)
ZnO grown by molecular beam epitaxy Zheng Zuo, Huimei Zhou, Mario J. Olmedo, Jieying Kong, Ward P. Beyermann, Jian-Guo Zheng, Yan Xin, and Jianlin Liu Quantum Structures Laboratory, Department of Electrical Engineering, University of California Riverside, Riverside, California 92521, USA Department of Physics and Astronomy, University of California(More)
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