Prism lens for beam collimation in a silicon photonic crystal beam-steering device

被引：11
|
作者：
Maeda, Jun [1 ]
Akiyania, Daichi [1 ]
Ito, Hiroyuki [1 ]
Abe, Hiroshi [1 ]
Baba, Toshihiko [1 ]
机构：
[1] Yokohama Natl Univ, Dept Elect & Comp Engn, 79-5 Tokiwadai, Yokohama, Kanagawa 2408501, Japan
来源：
OPTICS LETTERS | 2019年 / 44卷 / 23期
基金：
日本科学技术振兴机构;
关键词：
OPTICAL PHASED-ARRAY;
D O I：
10.1364/OL.44.005780
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The doubly periodic Si photonic crystal waveguide operates as a nonmechanical beam-steering device that can be applied in light detection and ranging. In this Letter, we develop and describe a prism lens that collimates a fan-shaped beam, emitted from the waveguide independent of the steering angle. Its fundamental profile is investigated using a theoretical analysis for thick lenses, and then, its detailed aspherical design is obtained. In ray tracing, this prism lens suppresses the beam divergence to less than the diffraction limit in most of the targeted beam-steering range. The prism lens is fabricated by acrylic cutting, and its expected characteristics are observed. (C) 2019 Optical Society of America
引用
收藏
页码：5780 / 5783
页数：4
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