本論文主要使用具有自旋角動量與軌道角動量之渦流光光鉗光束去抓取具有布拉格洋蔥狀結構之膽固醇液晶(CLC)微球，並研究其在強度似甜甜圈狀的渦流光斑內進行的軌道運動特性。除此外，本論文亦研究摻有偶氮染料與手性偶氮染料之CLC微球在照射紫外光前後的軌道運動變化與光致染料行同素異構化機制造成結構上改變之間的關係，以研究CLC微球軌道運動之外部光控效果。
第一部分實驗結果顯示，渦流光鉗之圓偏振旋性若與CLC微球旋性相同(相反)，則光鉗光子會發生反射(穿透)，因布拉格反射會使OAM反旋向，使得微球從光子獲得較多的軌道角動量轉移，以至於有較快(慢)的軌道轉速。
第二部分實驗結果顯示，在紫外光照射偶氮染料摻雜CLC微球下，染料會行transcis同素異構化而使cis態濃度遞增，這使得CLC等溫相變成各向同性，如此會使微球之軌道運動轉速降低。主要原因來自等溫相變前CLC微球的布拉格洋蔥狀結構功能上有類似於q=1的q-plate效果，此效果會轉移給微球一個與入射光鉗光子旋性相反的額外OAM (lћ=2qћ=2ћ)，而照光後CLC變成各向同性態後微球q-plate效應消失，使轉速微幅上升。但在從CLC態轉到各向同性態的過程中，有轉速大量下降的情形產生，原因是照光之下微球布拉格洋蔥狀結構被破壞而變成螺旋結構扭曲變形，由於CLC微球螺旋結構扭曲變形造成入射光鉗入射時被微球大角度散射機率大增，這使得散射光轉移給微球的有效OAM(投影在轉軸方向)變小許多，也因此讓此階段的微球轉速大量下降，週期大量變長，這種情況無論是在左旋或右旋的微球上皆是如此。
第三部分實驗結果顯示，在紫外光照射手性偶氮染料摻雜CLC微球時，染料會行transcis同素異構化而使cis態濃度遞增，這會引致CLC微球之HTP下降(螺距變長)而使反射波段紅移。除此之外，當微球之CLC反射波段紅移後包含(不包含)入射光鉗波長λOVT(660 nm)，也會因發生(不發生)布拉格反射而導致微球獲得的OAM較多(較少)，如此微球之軌道轉速會較快(較慢)，旋轉週期會較短(較長)。

The thesis used the optical vortex tweezers (OVTs) with spin angular momentum (SAM) and orbital angular momentum (OAM) to trap and induce the orbital motion of the cholesteric liquid crystal (CLC) microdroplets. The relationship between the orbital motion of CLC microdroplets doped with azo and azo-chiral dyes before and after ultraviolet light irradiation is also studied. The phase (pitch) change in CLC microdroplets induced by photoisomerization of the UV-excited azo dyes (azo-chiral dyes) leads to the light-controlling function of the orbital motion of the CLC microdroplets.

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