Synthesis of ZnO nanowires for application in surface plasmon polariton lasers
碩士 === 國立清華大學 === 材料科學工程學系 === 105 === ZnO is one of the most promising optical materials and allows lasing in ZnO nanowires at room temperature. Plasmonic lasers are potentially useful in applications in biosensing, photonic circuits, and high-capacity signal processing. In this work, we combine a...
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| Format: | Others |
| Language: | en_US |
| Published: |
2017
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| Online Access: | http://ndltd.ncl.edu.tw/handle/q7e6fg |
| Summary: | 碩士 === 國立清華大學 === 材料科學工程學系 === 105 === ZnO is one of the most promising optical materials and allows lasing in ZnO nanowires at room temperature. Plasmonic lasers are potentially useful in applications in biosensing, photonic circuits, and high-capacity signal processing. In this work, we combine a ZnO nanowire and single-crystalline metal films to fabricate Fabry-Perot type surface plasmon polariton (SPP) lasers to overcome the diffraction limit of conventional optics (λ/2n)3. High quality ZnO nanowires were synthesized by a vapor phase transport process via catalyzed growth. The ZnO nanowires were placed on a single-crystalline Al film grown with molecular beam epitaxy. Al2O3 deposited by atomic layer deposition was inserted between ZnO nanowires and Al film. The plasmonic laser is of metal-oxide-semiconductor (MOS) structure which might be compatible in processing of integrated silicon devices. The thickness effects of insulating layer on lasing threshold condition of the SPP nanolasers in the subwavelength regime were investigated. It was found that optimal thickness of dielectric layer deposited will lead to lower lasing threshold owing to the higher gain factor and lower metal loss.
Besides, we also discuss the optical properties of photonic lasers. ZnO nanowires are used as gain medium which are synthesized by hydrothermal method.
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