School of Instrument Science and Opto-Electronics Engineering, Laboratory of Optical Fibers and Micro-Nano Photonics, Hefei University of Technology, Hefei, 230009, Anhui, P. R. China
Zhang Xiaojuan
Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, School of Physics and Materials Science, Anhui University, Hefei, 230601, Anhui, P. R. China
Yu Benli
Information Materials and Intelligent Sensing Laboratory of Anhui Province, Key Laboratory of Opto-Electronic Information Acquisition and Manipulation of Ministry of Education, School of Physics and Materials Science, Anhui University, Hefei, 230601, Anhui, P. R. China
Ma Jiajun
State Key Laboratory of Environmental Friendly Energy Materials, Southwest University of Science and Technology, Mianyang, 621000, Sichuan, P. R. China
Xie Kang
School of Opto-Electronic Engineering, Zaozhuang University, Zaozhuang, 277160, Shandong, P. R. China
Cheng Sheng
Instrumental Analysis Center, Hefei University of Technology, Hefei, 230009, Anhui, P. R. China
Zhang Junxi
School of Instrument Science and Opto-Electronics Engineering, Laboratory of Optical Fibers and Micro-Nano Photonics, Hefei University of Technology, Hefei, 230009, Anhui, P. R. China
Hu Zhijia
School of Instrument Science and Opto-Electronics Engineering, Laboratory of Optical Fibers and Micro-Nano Photonics, Hefei University of Technology, Hefei, 230009, Anhui, P. R. China
In waveguided nematic liquid crystal random lasers (NLCRLs), we realize polarized random laser (RL) emission and discover that the waveguide effect reduces the transmission loss of the RL whose polarization is parallel to the liquid crystal molecules (LCMs). Compared with the traditional liquid crystal random lasers, the waveguide NLCRLs can achieve the regulation of RLs strength, polarization, and wavelength in the same structure. The electric field can drive the rotation of LCMs to control the RL polarization and intensity. The drop of horizontal polarization laser and the increase of vertical polarization laser prove the role of the waveguide effect. In addition, the disorder of the waveguided NLCRLs is highly sensitive to temperature, which makes it easy to control the wavelength and intensity of the RL. As the temperature rises, the waveguide effect is weakened, resulting in a weakening of the restriction along liquid crystal (LC) cell normal direction. The reduced laser intensity verifies the role of the waveguide effect.
