光学
极化(电化学)
全息术
物理
圆极化
雷
镜头(地质)
光强度
平面波
液晶
相位调制
横截面
材料科学
相位噪声
微带线
工程类
物理化学
化学
结构工程
作者
Yingjie Zhou,Yide Yuan,Tibin Zeng,Xiangru Wang,Dongliang Tang,Fan Fan,Shuangchun Wen
出处
期刊:Optics Letters
[Optica Publishing Group]
日期:2020-09-18
卷期号:45 (20): 5716-5716
被引量:24
摘要
In this Letter, transverse and longitudinal liquid crystal bifocal lenses (LCBLs) are proposed to continuously control the relative intensity of two foci through a simple polarization control. The modulation of a LCBL comes from the geometric phase control and is designed through the principle of holography, where the object wave is a light field from two foci respectively formed by the left-circular polarized (LCP) and right-circular polarized (RCP) light, and the reference wave is the incident plane wave. Constructed millimeter-scale LCBLs are verified experimentally, and the foci are precisely formed at the preset plane. Besides, the relative intensity can be easily controlled with different weights of LCP and RCP light. The proposed strategy overcomes the shortcomings of previous bifocal lenses, such as a complex design method, a long optimization time, and an unchangeable relative intensity, and it is expected to find potential applications in parallel optical processing and optical interconnections.
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