Nonmechanical Infrared Beam Steering Using Blue Addressed Quantum Dot Doped Liquid Crystal Grating

Xiangru Wang; Xiaoping Huang; Ziqiang Huang; Liang Wu; Jiyang Shang; Qi Qiu; Shuanghong Wu

doi:10.1186/s11671-016-1816-8

Nonmechanical Infrared Beam Steering Using Blue Addressed Quantum Dot Doped Liquid Crystal Grating

Nanoscale Res Lett. 2017 Dec;12(1):36. doi: 10.1186/s11671-016-1816-8. Epub 2017 Jan 13.

Authors

Xiangru Wang¹, Xiaoping Huang², Ziqiang Huang³, Liang Wu², Jiyang Shang⁴, Qi Qiu⁵, Shuanghong Wu⁵

Affiliations

¹ School of Optoelectronic information, University of Electronic Science and Technology of China, Chengdu, 610054, China. xiangruwang@uestc.edu.cn.
² School of Physical Electronics, University of Electronic Science and Technology of China, Chengdu, 610054, China.
³ Research Institute Electronic Science and Technology, University of Electronic Science and Technology of China, Chengdu, 610054, China.
⁴ Shanghai Aerospace Electronic Technology Institute Shanghai, Shanghai, 201109, China.
⁵ School of Optoelectronic information, University of Electronic Science and Technology of China, Chengdu, 610054, China.

Abstract

We present a scheme of nonmechanical laser beam steering using ZnS/InP quantum dots doping nematic liquid crystal as the optical recording film. Because of its internal electric field generated by blue laser-induced charge carrier distribution, liquid crystal molecules are reoriented to form a phase grating which make the incident angle steer to the angle as we desire. Being a nonmechanical programmable laser beam steering, the anisotropy of the relative permittivity tensor and blue laser-induced electric carriers play a significant effect in determining the reorientable liquid crystal molecule and reconfigurable phase modulation of the gratings, that determines the steering angle and steering efficiency.

Keywords: Liquid crystal grating; Nonmechanical beam steering; Quantum dot.