Low-voltage and wide-band tuning of lasing in a dye-doped liquid-crystal sandwich structure.
Low-voltage and wide-band tuning of lasing in a dye-doped liquid-crystal sandwich structure.
复制标题
染料掺杂液晶夹层结构中激光的低电压和宽带调谐。
DOI：
10.1364/oe.23.030421
复制
发表时间：
2015
期刊：
影响因子：
3.8
通讯作者：
H. Yeh
中科院分区：
文献类型：
--
作者：
Yu;Y.M. Liu;H. Yeh
本文报道了液晶夹层结构中激光的电调谐。染料掺杂的CLC（NLC）层夹在两个CLC层之间以充当相位延迟器，其中CLC层充当腔镜，用于选择性反射光子带中的光，其具有与CLC层相同的螺旋旋向。由于NLC层中的光学本征模之间的相位延迟的波长依赖性质，夹层单元的透射光谱提供了大范围的调制。在对应于CLC层的反射带内的最大透射率的波长处发生激光发射。向NLC层施加电压使得可以偏移最大透射率的波长，从而调谐激光发射的波长。在这些实验中，1.25 V的外加电压足以使激光峰值波长偏移约47 nm。
This paper reports the electrical tuning of a lasing in a liquid crystal (LC) sandwich structure. A dye-doped nematic LC (NLC) layer is sandwiched between two CLC layers to act as a phase retarder with the CLC layers acting as cavity mirrors, for the selective reflection of light in the photonic band with the same sense of helix handedness as that of the CLC layers. The transmittance spectrum of the sandwich cell provides a large range of modulation due to the wavelength dependent nature of phase retardation between the optical eigenmodes in the NLC layer. Lasing occurs at wavelengths corresponding to the maximum transmittance within the reflection band of the CLC layers. The application of voltage to the NLC layer makes it possible to shift the wavelengths of maximum transmittance, thereby tuning the wavelength of lasing. In these experiments, an applied voltage of 1.25 V was sufficient to shift the lasing peak wavelength by approximately 47 nm.