The controllable intensity and polarization degree of random laser from sheared dye-doped polymer-dispersed liquid crystal

被引：9

作者：

Ye, Lihua ^{[1
]}

Li, Fangjie ^{[1
]}

Lu, Changgui ^{[1
]}

Cheng, Zhixiang ^{[1
]}

Hu, Guohua ^{[1
]}

Lu, Yanqing ^{[2
,3
]}

Cui, Yiping ^{[1
]}

机构：

[1] Southeast Univ, Adv Photon Ctr, Sch Elect Sci & Engn, Nanjing 210096, Jiangsu, Peoples R China

[2] Nanjing Univ, Coll Engn, Appl Sci, Nanjing 210093, Jiangsu, Peoples R China

[3] Nanjing Univ, Natl Lab Solid State Microstruct, Nanjing 210093, Jiangsu, Peoples R China

来源：

NANOPHOTONICS | 2018年 / 7卷 / 02期

基金：

中国国家自然科学基金;

关键词：

polarization degree; intensity; shear; controllable; random laser; ENERGY-TRANSFER; EMISSION; FILMS; LIGHT; FIBER;

D O I：

10.1515/nanoph-2017-0070

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The random laser from sheared dye-doped polymer-dispersed liquid crystal (DDPDLC) is investigated. As the emission intensity weakens, the threshold of random laser from DDPDLC increases from 2.0 mJ/pulse to 4.0 mJ/pulse, and the degree of polarization (DOP) increases from 0.1 to 0.78, obviously when the shear distance increases from 0 mm to 4 mm. As the liquid crystal droplets are gradually oriented in the shear direction caused by alignment direction of polymer chain and anisotropy of droplet shape, the scattering intensity perpendicular to the shear direction gradually decreases and that parallel to the shear direction gradually increases. The anisotropic absorption of the laser dye also plays a certain role as the shear distance is 0 mm. The controllable intensity and polarization degree of random laser have a huge potential for sensing applications.

引用

页码：473 / 478

页数：6

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