锌六方微管紫外激光特性的研究

IEEE/LEOS 3rd International Conference on Numerical Simulation of Semiconductor Optoelectronic Devices, 2003. Proceedings Pub Date : 2003-10-14 DOI:10.1109/NUSOD.2003.1259048

S. Yu, X. W. Sun, C. Yuen, S. Lau

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引用次数: 0

摘要

采用气相输运的方法在硅衬底上制备了棱柱状氧化锌(ZnO)六方微管。结果表明，ZnO六方微管在355nm光激发下具有/spl sim/393 nm的紫外激光发射特性。此外，还从理论上研究了微管激光器的激光特性和模态特性。这可以解释为微管激光器的高阈值泵浦强度是由于在棱柱面附近的高辐射损失造成的。此外，我们的计算表明，微管激光器的输出光束具有类似于甜甜圈的形状，可以作为激光镊子用于捕获低折射率的小粒子。

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Investigation of the ultraviolet lasing characteristics of zinc hexagonal microtubes

Prismatic zinc oxide (ZnO) hexagonal microtubes have been fabricated on silicon substrate by vapor transport. It is shown that the ZnO hexagonal microtubes have demonstrated ultraviolet (/spl sim/393 nm) lasing emission under 355 nm optical excitation. Furthermore, the lasing as well as modal characteristics of the microtube lasers are investigated theoretically. It can be explained that the high threshold pump intensity of the microtube lasers is due to high radiation loss near the prismatic facets. In addition, our calculation has shown that the output beam from the microtube lasers has a shape similar to the doughnut ring, which can find application as laser tweezers to trap low refractive index small particles.

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IEEE/LEOS 3rd International Conference on Numerical Simulation of Semiconductor Optoelectronic Devices, 2003. Proceedings

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