本論文利用染料摻雜藍相液晶製作可電調控廣角雷射器。藍相液晶的三維光子晶體的特性具備成為雷射共振腔的所需條件，因此可在藍相液晶中摻雜雷射染料製作出藍相液晶雷射器，IPS的電極結構可達到多個角度皆可利用電場調控雷射波長。第一部分，比較三種液晶材料，選擇最適合藍相液晶實驗的材料。第二部分，在多個角度下外加電場改變藍相液晶的光子能隙造成反射波長位移，發現在多個角度下皆可利用外加電場達到約70nm的反射光譜峰值位移。第三部分，製作藍相液晶雷射器，在多個角度下電控雷射波長可達到約55nm，完成利用染料摻雜藍相液晶製作可電調控廣角雷射器的研究。

In this study, we study electrically tunable wide-angle laser in dye-doped blue phase liquid crystals(BPLCs). BPLCs like the three-dimensional photonic crystals(PCs), and it can be used to be a laser cavity. When the laser dye doped BPLCs, a laser emission can be observed under appropriate pumping energy. Using IPS electrode structure can achieve electrically tunable wide-angle laser. In the first part, compare the three LC materials, choose the material which is most suitable for BPLCs. In the second part, applied electric field to the BPLC cell induce that PC structure is changed in the BPLC configuration under various angles, producing a shift of the photonic band gap under various angles. It is found that the shift is about 70nm. In the third part, we fabricate the BPLC laser, the shift of lasing wavelength were about 55nm under various angles. Electrically tunable wide-angle laser in dye-doped BPLCs have been achieved.

致謝 i
摘要 ii
Abstract iii
第一章　導論 1
1.1　前言 1
1.2　液晶簡介 1
1.2.1　何謂液晶 1
1.2.2　液晶的起源 2
1.2.3　液晶的分類 3
1.3 液晶物理 12
1.3.1 液晶之介電異向性 (Dielectric anisotropy, ∆ε) 12
1.3.2　液晶之雙折射特性 (Birefringence, ∆n) 13
1.3.3　液晶之連續彈性體理論(Elestic constants, K11、K22、K33) 16
1.3.4　液晶之秩序參數 17
第二章　理論介紹 19
2.1　雷射原理 19
2.2　一維光子晶體的特性 23
2.3　藍相液晶的三維光子晶體 25
2.4　參雜雷射染料的藍相液晶雷射 26
第三章　實驗方法與過程 28
3.1　材料介紹 28
3.1.1　藍相液晶的配置 28
3.1.2　IPS(In Plane Switching)電極結構的製作 29
3.1.3　液晶盒的製作 32
3.2 實驗架設 33
3.2.1　藍相液晶晶格的觀測 34
3.2.2　藍相液晶反射光譜的量測 34
3.2.3　藍相液晶雷射光譜的量測 35
第四章　實驗結果與討論 37
4.1　不同電極結構下的藍相液晶樣品光電特性量測 37
4.1.1　外加垂直電場下不同材料的光電特性量測 37
4.1.2　外加水平電場(IPS結構)下藍相液晶的光電特性量測 42
4.2　利用電控的廣角雷射器 52
第五章 結論 58
參考文獻 60

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