![]()
已经得到个称赞 给我点赞
- 教授
- 博士生导师
- 硕士生导师
- 教师拼音名称：lu hongbo
- 出生日期：1979-01-06
- 入职时间：2006-06-30
- 所在单位：化学与化工学院
- 学历：博士研究生毕业
- 性别：男
- 学位：博士学位
- 在职信息：在职
- 毕业院校：中国科学技术大学
胆甾液晶带隙内混合模式激光的电控开关
- 发表刊物：Liquid Crystals
- 关键字：Mixed mode laser ,polymer stabilised cholesteric liquid crystal ,mode switch ,speckle-free imaging
- 摘要：Both random laser and multimode band-edge laser have been found in cholesteric liquid crystals (CLCs). In this work, the laser emission in CLC with negative dielectric anisotropy under electric fields with different frequencies is investigated. Awide multi-wavelength lasing is achieved via the formation of multiple domains induced by low-frequency alternating current (AC) in the CLC system. The photonic bandgap with aweak reflection for aspecific band can also be observed in the multiple domains structure. Furthermore, two types of liquid crystal hosts with different birefringences are used to obtain different lasing cover ranges. The range of the multi-wavelength lasing is within the CLC bandgap and positively correlated to the bandwidth of the bandgap. In addition, ahigh-frequency AC or direct current (DC) can switch it to aband-edge laser based on the regular planar helical structure. The wide range switchable multi-wavelength laser may provide various applications, such as sensing and communication.
- 是否译文：否
- 发表时间：2020-10-06
