Enhancement of Second-Harmonic Generation by Helicoidal Distributed Feedback Action in a Ferroelectric Smectic C* Liquid Crystal Using Two Counter-Propagating Fundamental Waves
Enhancement of Second-Harmonic Generation by Helicoidal Distributed Feedback Action in a Ferroelectric Smectic C* Liquid Crystal Using Two Counter-Propagating Fundamental Waves
复制标题
使用两个反向传播基波通过铁电近晶 C* 液晶中螺旋分布反馈作用增强二次谐波生成
DOI：
10.1143/jjap.36.l1168
复制
发表时间：
1997
影响因子：
1.5
通讯作者：
Jeong
中科院分区：
文献类型：
--
作者：
Jeong
当两个反向传播的基波产生与螺旋面光学螺距相同波长的SH光时，铁电近晶C* 液晶螺旋面结构的二次谐波产生（SHG）被显著增强.这种基于螺旋分布反馈作用的增强信号与厚单元中样品厚度的四次方成比例，并且与相对厚样品中的常规相位匹配SHG信号相比变得更大，即，100 µm。
A remarkable enhancement was observed in the second-harmonic generation (SHG) from the helicoidal structure of a ferroelectric smectic C* liquid crystal, when two counter-propagating fundamental waves generate SH light with the same wavelength as the optical pitch of the helicoid. This enhanced signal based on a helicoidal distributed feedback action is proportional to the fourth power of the sample thickness in thick cells, and becomes larger compared with the conventional phase-matched SHG signal in relatively thick samples, i.e., 100 µm.