de Blas Mario García, García Javier Pereiro, Andreu Sergio Vera, Arregui Xabier Quintana, Caño-García Manuel, Geday Morten Andreas
CEMDATIC, ETSI Telecomunicación, Universidad Politécnica de Madrid, Av. Complutense 30, 28040, Madrid, Spain.
Sci Rep. 2022 Mar 24;12(1):5145. doi: 10.1038/s41598-022-09201-0.
Optical beam steering (BS) has multiple applications in fields like target seeking and tracking, optical tweezers, billboard displays and many others. In this work, a two-dimensional beam deflector based on blaze gratings is presented. Phase-only 1D blaze gratings have been prepared using maskless Direct Laser Writing (DLW) resulting in high-resolution structures in indium-tin oxide (ITO) coated glass wafers. The device is composed of two identical 1D liquid crystal (LC) cells cascaded orthogonally back-to-back, with a resultant active area of 1.1 × 1.1 mm. The 1D cells have been prepared with 144 pixels each with a 7.5 µm pitch. The total 288 pixels are driven by a custom made 12-bit Pulse Width Modulation (PWM) electronic driver, allowing for an arbitrarily high resolution. The system performance is documented, and the efficiency of the system has been tested. A maximum diagonal steering angle of ± 3.42° was achieved.
光束转向（BS）在目标搜索与跟踪、光镊、广告牌显示等诸多领域有着广泛应用。在这项工作中，提出了一种基于闪耀光栅的二维光束偏转器。使用无掩膜直接激光写入（DLW）制备了纯相位一维闪耀光栅，在氧化铟锡（ITO）涂层玻璃晶圆上形成了高分辨率结构。该器件由两个背对背正交级联的相同一维液晶（LC）单元组成，有效面积为1.1×1.1毫米。一维单元每个包含144个像素，像素间距为7.5微米。总共288个像素由定制的12位脉宽调制（PWM）电子驱动器驱动，可实现任意高分辨率。记录了系统性能，并对系统效率进行了测试。实现了最大±3.42°的对角转向角。
