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	Anisotropic and omnidirectional focusing in Luneburg lens structure with gradient photonic crystals
	Zhao, Yuan-Yuan1,2,3; Zhang, Yong-Liang1,2; Zheng, Mei-Ling1,2; Dong, Xian-Zi1,2; Duan, Xuan-Ming1,2,3; Zhao, Zhen-Sheng1,2
	2017
摘要	We propose a flexible design for implementation of the Luneburg lens with gradient photonic crystals. The full-wave simulation results demonstrate the excellent performance of omnidirectional focusing of the designed Luneburg lens over a broad frequency band, and firstly exhibit anisotropic focusing in the designed Luneburg lens with a specific frequency band. In this study, our effort is focused on figuring out the operating wavelength range where the effective medium approximation theory is applicable, and the mechanism for generating anisotropic and omnidirectional focusing in Luneburg lens structure.
关键词	Luneburg lens photonic crystals metamaterial nanophotonics gradient index
DOI	10.1088/2040-8986/19/1/015605
发表期刊	JOURNAL OF OPTICS
ISSN	2040-8978
卷号	19期号:1页码:7
通讯作者	Zheng, ML (reprint author), Chinese Acad Sci, Tech Inst Phys & Chem, Lab Organ NanoPhoton, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China. ; Zheng, ML (reprint author), Chinese Acad Sci, Tech Inst Phys & Chem, CAS Key Lab Bioinspired Mat & Interfacial Sci, 29 Zhongguancun East Rd, Beijing 100190, Peoples R China.
收录类别	SCI
WOS记录号	WOS:000413644300004
语种	英语