Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications
碩士 === 國立臺灣大學 === 光電工程學研究所 === 100 === In this thesis, dielectric microdisk resonators embedded with CdSe/ZnS colloidal quantum dots were demonstrated in the visible range of 600 nm. We fabricated silicon dioxide microdisks embedded with CdSe/ZnS colloidal quantum dots with diameters of 8 μm and 1...
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ndltd-TW-100NTU051240422015-10-13T21:50:16Z http://ndltd.ncl.edu.tw/handle/76305555882597521755 Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications 埋覆硒化鎘/硫化鋅膠狀量子點介電質微碟共振腔之雷射應用 Chia-Hung Lin 林家鴻 碩士 國立臺灣大學 光電工程學研究所 100 In this thesis, dielectric microdisk resonators embedded with CdSe/ZnS colloidal quantum dots were demonstrated in the visible range of 600 nm. We fabricated silicon dioxide microdisks embedded with CdSe/ZnS colloidal quantum dots with diameters of 8 μm and 10 μm, respectively. Lasing has been observed for the 10-μm-diameter microdisk resonator, and the quality factor and the threshold pump power are about 3,100 and 85 μW, respectively. Since silicon nitride has higher refractive index than silicon dioxide, better optical confinement and higher quality factor can be expected in silicon nitride microdisk resonators. However, silicon nitride microdisk resonators could be damaged with excessive pump power. The problem can be relieved by decreasing the flow rate of silane in the silicon nitride deposition process at the cost of lowering refractive index. The quality factor of a 4-μm-diameter microdisk resonator with silane flow rate of 125 sccm is about 1,000. For microdisk resonators with silane flow rate of 76 sccm, whispering gallery modes can also be observed for diameters of 6 μm and 8 μm, and the quality factors are about 400. We also discuss and improve the fabrication process to achieve better measurement results. 毛明華 2012 學位論文 ; thesis 53 zh-TW |
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碩士 === 國立臺灣大學 === 光電工程學研究所 === 100 === In this thesis, dielectric microdisk resonators embedded with CdSe/ZnS colloidal quantum dots were demonstrated in the visible range of 600 nm. We fabricated silicon dioxide microdisks embedded with CdSe/ZnS colloidal quantum dots with diameters of 8 μm and 10 μm, respectively. Lasing has been observed for the 10-μm-diameter microdisk resonator, and the quality factor and the threshold pump power are about 3,100 and 85 μW, respectively.
Since silicon nitride has higher refractive index than silicon dioxide, better optical confinement and higher quality factor can be expected in silicon nitride microdisk resonators. However, silicon nitride microdisk resonators could be damaged with excessive pump power. The problem can be relieved by decreasing the flow rate of silane in the silicon nitride deposition process at the cost of lowering refractive index. The quality factor of a 4-μm-diameter microdisk resonator with silane flow rate of 125 sccm is about 1,000. For microdisk resonators with silane flow rate of 76 sccm, whispering gallery modes can also be observed for diameters of 6 μm and 8 μm, and the quality factors are about 400. We also discuss and improve the fabrication process to achieve better measurement results.
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毛明華 |
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毛明華 Chia-Hung Lin 林家鴻 |
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Chia-Hung Lin 林家鴻 |
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Chia-Hung Lin 林家鴻 Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
author_sort |
Chia-Hung Lin |
title |
Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
title_short |
Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
title_full |
Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
title_fullStr |
Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
title_full_unstemmed |
Dielectric Microdisks with Embedded CdSe/ZnS Colloidal Quantum Dots for Laser Applications |
title_sort |
dielectric microdisks with embedded cdse/zns colloidal quantum dots for laser applications |
publishDate |
2012 |
url |
http://ndltd.ncl.edu.tw/handle/76305555882597521755 |
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