Long-distance super-resolution imaging assisted by enhanced spatial   Fourier transform

doi:10.1364/OE.23.023613

CORC > 北京大学 > 信息科学技术学院

	Long-distance super-resolution imaging assisted by enhanced spatial Fourier transform
	Tang, Heng-He ; Liu, Pu-Kun
刊名	OPTICS EXPRESS
	2015
关键词	FAR-FIELD INDEX LENS MICROSCOPE WAVES LIGHT
DOI	10.1364/OE.23.023613
英文摘要	A new gradient-index (GRIN) lens that can realize enhanced spatial Fourier transform (FT) over optically long distances is demonstrated. By using an anisotropic GRIN metamaterial with hyperbolic dispersion, evanescent wave in free space can be transformed into propagating wave in the metamaterial and then focused outside due to negative-refraction. Both the results based on the ray tracing and the finite element simulation show that the spatial frequency bandwidth of the spatial FT can be extended to 2.7k(0) (k(0) is the wave vector in free space). Furthermore, assisted by the enhanced spatial FT, a new long-distance (in the optical far-field region) super-resolution imaging scheme is also proposed and the super resolved capability of lambda/5 (lambda is the wavelength in free space) is verified. The work may provide technical support for designing new-type high-speed microscopes with long working distances. (C) 2015 Optical Society of America; National Natural Science Foundation of China [61471007]; Fundamental Research Funds for the Central Universities ("985 Project"); SCI(E); EI; ARTICLE; pkliu@pku.edu.cn; 18; 23613-23623; 23
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/416346]
专题	信息科学技术学院
推荐引用方式 GB/T 7714	Tang, Heng-He,Liu, Pu-Kun. Long-distance super-resolution imaging assisted by enhanced spatial Fourier transform[J]. OPTICS EXPRESS,2015.
APA	Tang, Heng-He,&Liu, Pu-Kun.(2015).Long-distance super-resolution imaging assisted by enhanced spatial Fourier transform.OPTICS EXPRESS.
MLA	Tang, Heng-He,et al."Long-distance super-resolution imaging assisted by enhanced spatial Fourier transform".OPTICS EXPRESS (2015).