Li Lianlin, Li Fang, Cui Tie Jun, Yao Kan
Opt Express. 2015 Jan 12;23(1):401-12. doi: 10.1364/OE.23.000401.
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.
超越衍射极限的远场成像是各种成像应用中长期追求的目标，通常需要机械扫描或天线阵列。在此，我们提出使用单个传感器与时空共振孔径天线相结合来解决这一具有挑战性的问题。我们在理论和数值上证明，这种共振孔径天线能够将部分倏逝波转换为传播波并将其传输到远场。所提出的成像概念提供了在宽带电磁波照射下实现实时数据超分辨率的独特能力，而无需诸如近场扫描、机械扫描或天线阵列等苛刻要求。我们期望这种成像方法在微波、太赫兹、光学和超声领域的超分辨率成像方面取得突破。
