本論文主要藉由在膽固醇液晶雷射中加入可光致同素異構化親手性材料，使膽固醇液晶所輸出的彩色錐角雷射波段可光調控及空間調控，其雷射輸出波段可調控的機制是由於當同素異構化（trans→cis）反應產生後，光致同素異構化親手性材料的HTP值降低並造成膽固醇液晶螺距改變，藉此間接調控輸出的雷射波長，同素異構化的程度愈高（即cis濃度愈高），膽固醇液晶所輸出的彩色錐角雷射波段可調控範圍也愈大。此外我們以UV光強度梯度照射DDCLC樣品的方式，製作出一個可空間調控彩色錐角雷射輸出波段的雷射元件。不論是光調控或空間調控，其雷射波段可調控範圍皆可達100nm以上。因此，相較於之前的膽固醇液晶雷射，此彩色錐角雷射具有較好的調控特性。

This study demonstrates optically and spatially band-tunable color cone lasers (CCLs) based on DDCLC cells with a photoisomerizable chiral dopant. The band-tunability is attributable to the recovery of the helix of the CLC resulted from the trans-cis isomerization induced decrease of the helical twisting power of the chiral dopant.The more the chiral cis-isomers are produced, the larger the tuned lasing band is.A color cone laser with a spatial band-tunability can be obtained with a gradient-intensity-irradiation of UV light on the DDCLC cell.Total wavelength ranges of optical and spatial band-tunability both exceed 100nm.Therefore,the CCL has greater tunable features than those of the previous CLC lasers.

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