Terahertz far-field superresolution imaging through spoof surface plasmons illumination

被引：16
|
作者：
Tang, Heng-He [1 ]
Liu, Pu-Kun [1 ]
机构：
[1] Peking Univ, Sch Elect Engn & Comp Sci, Beijing 100871, Peoples R China
来源：
OPTICS LETTERS | 2015年 / 40卷 / 24期
基金：
中国国家自然科学基金;
关键词：
MICROSCOPY; SUPERLENS; METAMATERIAL; TECHNOLOGY; LIMIT; LENS;
D O I：
10.1364/OL.40.005822
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The applications of terahertz (THz) imaging are always restricted by the low resolution. We introduce here a new way to realize far-field superresolution imaging at THz frequency. Assisted by a new spoof surface plasmons (SSP) probe illumination, the images of two subwavelength separated slits can be reconstructed by a single shot. Although only 0.06. resolution is numerically demonstrated at 0.3 THz, the resolution potentially can be further enhanced by scaling down the size of the SSP probe. Deep subwavelength focusing is also achieved by the SSP probe. Our work may open a new avenue for SSP-based superresolution at longer wavelengths. (C) 2015 Optical Society of America
引用
收藏
页码：5822 / 5825
页数：4
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