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研究生： 符凱竣
Fu, Kai-Jun
論文名稱： 在銣原子胞中建立電磁波誘發透明之探討
Experimental Study of Electromagnetically Induced Transparency in a Rubidium Cell
指導教授： 管培辰
Kuan, Pei-Chen
學位類別： 碩士
Master
系所名稱： 理學院 - 物理學系
Department of Physics
論文出版年： 2022
畢業學年度： 110
語文別： 中文
論文頁數： 38
中文關鍵詞： 電磁波誘發透明
外文關鍵詞： Electromagnetically Induced Transparency
相關次數： 點閱：92  下載：18 
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    • 本論文為慢光實驗和光拖曳(light dragging) 實驗的基礎實驗，我們使用一台雷射 產生耦合光，利用電光調變器(electro-optical modulator，簡稱EOM)與法布立-佩羅 干涉儀(Fabry–P´erot interferometer，簡稱Etalon)調變並篩選出探測光，經過磁場屏 蔽，掃描耦合光的光強度，在使用D2 line的耦合光與探測光時，最佳的電磁波誘發 透明(electromagnetically induced transparency，簡稱EIT)光譜穿透率為0.7%，由 於銣原子激發態5 2P3/2, F ′′=1,2,3,4的能階頻率差為29.372、63.401、120.640 MHz， 在室溫下原子對雷射光受都普勒效應的影響，會使探測光被銣原子吸收而被消耗， 因此我們改用D1 line的雷射光進行實驗，其激發態5 2P1/2, F ′=2,3的能階頻率差 為361.58 MHz，最佳的EIT光譜穿透率為14.3%。 關鍵字：電磁波誘發透明

    In this thesis, we generated Electromagnetically Induced Transparency (EIT) with Rubidium 85 in room temperature. First, we use D2 line coupling beam and probe beam to generat EIT, the best EIT transmission is 0.7%. Since the energy level frequency difference of Rubidium 85 atoms F′′=1,2,3,4 is 29.372 MHz, 63.401 MHz, 120.640 MHz, coupling beam and probe beam will be absorbed by rubidium atoms instead of making the EIT. Therefore, we use D1 line to do experiments, and the best EIT transmission is 14.3%.

    摘要 I 英文摘要延伸 II 致謝 VII 目錄 IX 1 基本原理 1 1.1 電磁波誘發透明簡介 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 2 實驗架設 8 2.1 銣原子(RB85) 能階與特性 . . . . . . . . . . . . . . . . . . . . . . . . . 8 2.2 頻率調變光譜 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3 光路架設 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 2.3.1 雷射鎖頻 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 2.3.2 耦合光 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 2.3.3 探測光 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16 2.3.4 幫浦光 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 2.3.5 法布立-佩羅干涉儀 . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.4 微波電路設置 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.4.1 AOM設置 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 2.4.2 EOM設置 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.4.3 掃頻系統 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 2.4.4 雷射脈衝與數據解析 . . . . . . . . . . . . . . . . . . . . . . . . 20 2.5 銣原子蒸氣瓶設置 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 2.5.1 磁場屏蔽 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 3 實驗結果 24 3.1 磁場校正 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 3.2 耦合光強度 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 3.3 非共振時的EIT光譜 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28 3.4 賽曼能階之EIT光譜 . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30 3.5 D1 line中EIT光譜 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32 4 結論與未來展望 35 參考文獻 36

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