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Metal-oxide-SiO2 composite ZnO lasers

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5 Author(s)
E. S. P. Leong ; Sch. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore ; S. F. Yu ; M. K. Chong ; O. K. Tan
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The use of metal-oxide-SiO2 composite to sustain random lasing in ZnO thin films is proposed. It is shown that the presence of stripe pattern in the metal-oxide-SiO2 composite is necessary to minimize lasing threshold and achieve directional emission. By controlling the concentration of the metal-oxide and stripe spacing, coherent lasing threshold and linewidth of ∼85 kW/cm2 and ∼0.4 nm, respectively, can be obtained from mirrorless ZnO thin-film waveguide lasers.

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IEEE Photonics Technology Letters  (Volume:17 ,  Issue: 9 )