篇目详细内容 |
【篇名】 |
Sub-diffraction-limited far-field imaging in infrared |
【刊名】 |
Frontiers of Physics in China |
【刊名缩写】 |
Front. Phys. China |
【ISSN】 |
1673-3487 |
【EISSN】 |
1673-3606 |
【DOI】 |
10.1007/s11467-010-0109-4 |
【出版社】 |
Higher Education Press and Springer-Verlag Berlin
Heidelberg |
【出版年】 |
2010 |
【卷期】 |
5
卷3期 |
【页码】 |
324-329
页,共
6
页 |
【作者】 |
Pratik CHATURVEDI;
Nicholas X. FANG;
|
【关键词】 |
infrared imaging; surface plasmons; subwavelength structures metamaterials; superresolution |
【摘要】 |
We investigated a far-field superlens operating at mid-infrared wavelength that allows resolving subwavelength features in the far-field. By utilizing evanescent enhancement provided by surface plasmon excitation of silver nanorods and Moiré effect, we numerically demonstrated that subwavelength information of an object can be converted to propagating information. This information can then be captured by conventional optical components. A simple image reconstruction algorithm can restore the subwavelength object. A sub-diffraction-limited resolution of 2.5?μm at 6-μm wavelength is demonstrated. |