Chinese Optics Letters, 2019, 17 (8): 080501, Published Online: Jul. 23, 2019  

Multi-band imaging and focusing of photonic crystal flat lens with scatterer-size gradient Download: 891次

Author Affiliations
Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education & Hunan Provincial Key Laboratory of Low-Dimensional Structural Physics and Devices, School of Physics and Electronics, Hunan University, Changsha 410082, China
Abstract
In this Letter, a photonic crystal (PC) flat lens with a scatterer-size gradient is proposed, which simultaneously achieves imaging of the point source and sub-wavelength focusing of the plane wave in the first, second, and fifth bands. The imaging of the point source breaks through the diffraction limit in the second and fifth bands. The PC flat lens with the scatterer-size gradient is expected to be used in a new multifunctional optical imaging and focusing device, which improves the application potential of a PC flat lens.

Yuan Cen, Jianlan Xie, Jianjun Liu. Multi-band imaging and focusing of photonic crystal flat lens with scatterer-size gradient[J]. Chinese Optics Letters, 2019, 17(8): 080501.

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