naa a22 4500 510817580 CHVBK 20180411083515.0 cr unu---uuuuu 180411e20130601xx s 000 0 eng 10.1007/s11468-012-9394-9 doi (NATIONALLICENCE)springer-10.1007/s11468-012-9394-9 Negative Refraction and Focusing of Photonic Crystals with Graded Negative Index in Visible Regime [Elektronische Daten] [Qingyi Zhu, Yongqi Fu, Zhimin Zhang, Zhijun Xu, Weixing Yu] In this paper, we designed a hexagonal lattice photonic crystal (PC) which presents negative refraction behavior in the broadband visible region. By varying the PC parameters, a graded index PC was obtained for the purpose of focusing a plane wave with large transmission. Finite-difference and time-domain algorithm-based numerical calculation was adopted to demonstrate the negative refraction and analyze the focusing effect. Calculation results demonstrate that the designed PCs have good focusing property together with large transmission. The proposed structures provide an approach for designing the negative refraction-based imaging systems. Springer Science+Business Media, LLC, 2012 Photonic crystals nationallicence Negative refraction nationallicence Focusing nationallicence FDTD nationallicence Zhu Qingyi School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut Fu Yongqi School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut Zhang Zhimin School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut Xu Zhijun State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033, Changchun, Jilin Province, People's Republic of China aut Yu Weixing State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033, Changchun, Jilin Province, People's Republic of China aut Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 335-340 1557-1955 8:2<335 2013 8 11468 https://doi.org/10.1007/s11468-012-9394-9 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11468-012-9394-9 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Zhu Qingyi School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut NATIONALLICENCE 700 1- Fu Yongqi School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut NATIONALLICENCE 700 1- Zhang Zhimin School of Physical Electronics, University of Electronic Science and Technology of China, 610054, Chengdu, Sichuan Province, People's Republic of China aut NATIONALLICENCE 700 1- Xu Zhijun State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033, Changchun, Jilin Province, People's Republic of China aut NATIONALLICENCE 700 1- Yu Weixing State Key Laboratory of Applied Optics, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Sciences, 130033, Changchun, Jilin Province, People's Republic of China aut NATIONALLICENCE 773 0- Plasmonics Springer US; http://www.springer-ny.com 8/2(2013-06-01), 335-340 1557-1955 8:2<335 2013 8 11468 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer