Open AccessFar-field imaging beyond diffraction limit using single sensor in combination with a resonant aperture
Author(s) -
Lianlin Li,
Fang Li,
Tie Jun Cui,
Kan Yao
Publication year - 2015
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.23.000401
Subject(s) - optics , diffraction , terahertz radiation , microwave imaging , antenna (radio) , aperture (computer memory) , near and far field , physics , antenna aperture , image resolution , broadband , microwave , antenna array , radiation pattern , acoustics , computer science , telecommunications , quantum mechanics
Far-field imaging beyond the diffraction limit is a long sought-after goal in various imaging applications, which requires usually mechanical scanning or an array of antennas. Here, we propose to solve this challenging problem using a single sensor in combination with a spatio-temporal resonant aperture antenna. We theoretically and numerically demonstrate that such resonant aperture antenna is capable of converting part evanescent waves into propagating waves and delivering them to far fields. The proposed imaging concept provides the unique ability to achieve super resolution for real-time data when illuminated by broadband electromagnetic waves, without the harsh requirements such as near- field scanning, mechanical scanning, or antenna arrays. We expect the imaging methodology to make breakthroughs in super-resolution imaging in microwave, terahertz, optical, and ultrasound regimes.