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系統識別號 U0026-1306201314210600
論文名稱(中文) 光渦流陣列雷射光鉗系統於微流體中之分析與應用
論文名稱(英文) Analysis and Application of Optical Vortex Array Laser Beam Tweezers in Microfluidics
校院名稱 成功大學
系所名稱(中) 物理學系碩博士班
系所名稱(英) Department of Physics
學年度 101
學期 2
出版年 102
研究生(中文) 盧奕宇
研究生(英文) Yi-Yu Lu
學號 L26991253
學位類別 碩士
語文別 中文
論文頁數 107頁
口試委員 指導教授-朱淑君
口試委員-蔡錦俊
口試委員-柯景元
中文關鍵字 光渦流陣列雷射光鉗  微流體  粒子軌跡  粒子的分離系統 
英文關鍵字 optical vortex array laser beam tweezers  microfluidics  particle trajectory  particle-separation system 
學科別分類
中文摘要 本篇論文以流體力學為基礎建構模擬模型,使用了數值軟體(MATLAB)撰寫程式來模擬流體中粒子在光場下之運動軌跡。接著,本論文利用所撰寫的程式探討光渦流陣列雷射光鉗系統於微流體中捕捉粒子的特性及其應用。本論文有兩個重點:一、分析了光渦流陣列雷射光鉗系統於微流體中捕捉粒子的系統特性,例如:功率、流速、光腰、粒子大小、系統縮放…等因素對該光鉗系統的影響,並與一般由高斯光束建構之光鉗系統做比較。二、利用光渦流陣列雷射光鉗系統特性設計了兩種粒子的分離系統:非連續型分離系統和連續型分離系統。非連續型分離系統根據不同大小之粒子在光場中受力不同的特性,不同大小粒子在特定流速微流體中無法同時被光鉗捕捉,而能有效分離兩種粒子。連續型分離系統則是根據不同大小之粒子於光場中有不同的匯聚點的特性來進行粒子分離。本論文的研究成果將有助於未來實驗上建構光渦流陣列雷射光鉗系統,及該光鉗系統於不同物性微粒子篩選之應用。
英文摘要 This thesis use the MATLAB software to construct simulation model based on the hydrodynamics. The simulation model can simulate the particle trajectory in the fluids under various optical fields. This thesis discussed the application and the properties of optical vortex array laser beam tweezers in microfluidics using the constructed simulation model. This thesis discussed two main issues. Firstly, this thesis analyzed various factors to the particle-tapping in microfluids with vortex array laser optical tweezers, such as laser power, microfluid velocity, beam waist size, particle size, and the influence of the scaling of the system. This thesis also compares the properties of vortex array laser beam tweezers in microfluids with the traditional Gaussian beam tweezers. Lastly, this thesis designs and simulates two kinds of particle-separation systems using the properties of vortex array laser beam tweezers in microfluids. The two particle-separation systems are non-continuous and continuous particle-separation systems, respectively. The non-continuous particle-separation system was designed based on the trapping force difference between particles of different sizes in the same optical field. The particles of different size in the microfluid will not be trapped by the optical tweezers at the same time while the microfluids are flowing with a certain velocity. The continuous particle-separation system separates particles of different size using the trapping locations difference between particles of different size. The study results of this thesis will be helpful to the future experiments of building up vortex array laser beam tweezers and the development of vortex array laser beam-based particle-separation system.
論文目次 目錄
摘要 I
Abstract II
誌謝 IV
目錄 V
圖表目錄 VII
第一章 緒論 1
第二章 光渦流陣列雷射光束之光鉗系統 4
2.1 恩司─高斯光束(Ince-Gaussian Beams, IGBs) 4
2.2光渦流陣列雷射光束(Vortex Array Laser Beams) 6
2.3光鉗(Optical Tweezers) 10
2.4 Discrete-Dipole Approximation(DDA) method 11
第三章 流體力學 14
3.1雷諾數 (Reynolds Number) 14
3.2層流(Laminar Flow) 15
3.3司托克斯(Stokes)定律 16
3.4佛客-普朗克解說(FOKKER-PLANCK Description) 18
3.5朗之萬解說(Langevin Description) 20
3.6簡單系統(球型粒子)之公式推導 24
3.7三流道聚焦 26
第四章 模擬運動軌跡之方法與驗證 28
4.1模擬運動軌跡之方法 28
4.2模擬運動軌跡之驗證 32
4.2.1 與“Optical gradient flow focusing”比較 32
4.2.2與“Cross-Type Optical Particle Separation in a Microchannel” 比較 34
第五章 光場內粒子於微流體運動軌跡之性質探討 37
5.1 “光渦流陣列雷射光束”與“高斯光束”於流體中的捕捉力比較 37
5.2系統的縮放特性 52
5.3參考用位能圖與軌跡 58
第六章 光渦流陣列雷射光鉗系統於微流體之應用:粒子分離系統 63
6.1設計案例1:非連續型分離系統 63
6.2設計案例2:連續型分離系統 66
第七章 結論與未來展望 73
參考文獻 75
附錄 78
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