Transparent optical fingerprint capture system based on subwavelength metallic grating couplers
Transparent optical fingerprint capture system based on subwavelength metallic grating couplers
复制标题
基于亚波长金属光栅耦合器的透明光学指纹采集系统
DOI：
10.1364/ome.6.003899
复制
发表时间：
2016-12-01
影响因子：
2.8
通讯作者：
Ye, Zhicheng
中科院分区：
文献类型：
--
作者：
Cui, Xuecheng;Ma, Ping;Ye, Zhicheng
A transparent optical fingerprint capture system based on grating couplers was proposed and demonstrated. Metallic gratings were used as high efficiency input/output couplers to control the light propagation in the planar waveguide. Via the comprehensive design of grating pitch and waveguide thickness, not only was light coupling achieved, but also the propagation angle of the light beam in the waveguide was well engineered to avoid the overlap of images; thus an undistorted full area of finger sensing is fulfilled in a slim and transparent structure. The proposed system was experimentally demonstrated with characteristics of considerable contrast as a potential candidate of a fingerprint sensor. (C) 2016 Optical Society of America
