楔形盒染料掺杂胆甾相液晶激光器研究  

Investigation of the laser action in a dye-doped cholesteric liquid crystal wedge cell

作　　者：岱钦[1] 李勇[1] 乌日娜[1] 耿岳[1] 全薇[1] 李业秋[1] 彭增辉 姚丽双 

机构地区：[1]沈阳理工大学理学院,沈阳110159 [2]中科院长春光学精密机械与物理研究所,应用光学国家重点实验室,长春130033

出　　处：《物理学报》2013年第4期262-265,共4页Acta Physica Sinica

基　　金：国家自然基金(批准号:60777011);辽宁省自然科学基金(批准号:20102191);沈阳科学技术计划(批准号:F10214100)资助的课题~~

摘　　要：设计制作了楔形盒掺杂激光染料PM580的胆甾相液晶器件,研究了激光辐射行为.在楔形液晶盒中出现了一系列与楔棱平行的向错线和不同规则形状的晶畴,胆甾相液晶形成了平面态排列.采用固体Nd:YAG倍频532nm波长激光作为抽运光,获得调谐精度约1nm,调谐范围约17nm的一维波长可调谐激光器.楔形盒中,液晶扭曲力与取向膜表面锚定力相互平衡的过程中胆甾相液晶螺距伸张,光子禁带位置移动,从而调谐光子禁带边沿出射激光波长.The wedge cell of cholesteric liquid crystal device is designed and fabricated, and doping PM580 （exciton） in the cholesteric liquid crystal, the laser emission action is studied. There appear a series of parallel wedge edges of dislocation Jines and different shapes of domain in the wedge cell. The planar state of alignment is confirmed. A second harmonic Nd：YAG 532 nm laser is adopted as a pump light beam, and then one-dimensional tunable laser radiation is obtained and its wavelength interval is approximately 1 nm and tuning range is about 17 rim. In the processs of interaction between the torques of LC and the surface anchoring of direction film, the pitch elongation takes place. The positon of photonic band gap is changed, so the laser radiation wavelength can be tuned in the band edge.

关 键 词：胆甾相液晶 楔形盒 激光辐射 

分 类 号：O753.2[理学—晶体学]