Quasi-in-Plane Leaky Lasing Modes from Thin Waveguiding Layers of Nematic and Cholesteric Liquid Crystals
Quasi-in-Plane Leaky Lasing Modes from Thin Waveguiding Layers of Nematic and Cholesteric Liquid Crystals
复制标题
向列型和胆甾型液晶薄波导层的准面内泄漏激光模式
DOI：
10.1080/15421400701205404
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发表时间：
2007
影响因子：
0.7
通讯作者：
P. Pagliusi
中科院分区：
文献类型：
--
作者：
L. Blinov;S. Palto;V. V. Lazarev;G. Cipparrone;A. Mazzulla;P. Pagliusi
通过全息或其他技术，在没有反射镜和增益或折射率的特殊调制的平面波导几何结构中，在液晶的双相、双相和各向同性相中观察到来自染料掺杂液晶的激光。光产生在液晶层中，该液晶层由两个玻璃限定，具有或不具有半透明电极，其形成光波导。强的光放大沿着由泵浦光束产生的窄条发生，波导壁提供必要的反馈。激光模式泄漏到玻璃中，在玻璃中以非常掠射角被引导，并从边缘离开细胞。激光的强度和偏振依赖于液晶和约束玻璃的折射率。以最简单的染料掺杂各向同性相为例，从解析和数值两方面讨论了产生激光的条件。
Lasing from dye doped liquid crystals was observed in the nematic, cholesteric and isotropic phases of liquid crystals in the plane waveguide geometry without mirrors and special modulation of the gain or refraction index by a holographic or other technique. The light was generated in a liquid crystal layer confined by two glasses with or without semitransparent electrodes, which formed an optical waveguide. A strong light amplification occurred along the narrow stripe produced by the pump beam with the necessary feedback provided by the walls of the waveguide. The lasing modes leaked into the glasses, were guided therein at very grazing angles and left the cell from its edges. The intensity and polarization of the lasing light depend on refraction indices of the liquid crystal and confining glasses. The conditions for lasing were discussed both analytically and numerically on the simplest example of the dye doped isotropic phase.