Observation of valley-dependent beams in photonic graphene

被引:41
作者
Deng, Fusheng [1 ,2 ]
Sun, Yong [1 ]
Wang, Xiao [1 ]
Xue, Rui [1 ]
Li, Yuan [1 ]
Jiang, Haitao [1 ]
Shi, Yunlong [1 ,2 ]
Chang, Kai [3 ]
Chen, Hong [1 ]
机构
[1] Tongji Univ, Sch Phys Sci & Engn, MOE Key Lab Adv Microstructured Mat, Shanghai 200092, Peoples R China
[2] Shanxi Datong Univ, Inst Solid State Phys, Datong, Peoples R China
[3] Chinese Acad Sci, Inst Semicond, SKLSM, Beijing 100083, Peoples R China
来源
OPTICS EXPRESS | 2014年 / 22卷 / 19期
基金
中国国家自然科学基金;
关键词
TRANSMISSION; POLARIZATION; MOS2;
D O I
10.1364/OE.22.023605
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Valley-dependent propagation of light in an artificial photonic hexagonal lattice, akin to electrons in graphene, is investigated in microwave regime. Both numerical and experimental results show that the valley degeneracy in the photonic graphene is broken when the frequency is away from the Dirac point. The peculiar anisotropic wave transport property due to distinct valleys is analyzed using the equifrequency contours. More interestingly, the valley-dependent self-collimation and beam splitting phenomena are experimentally demonstrated with the armchair and zigzag interfaces, respectively. Our results confirm that there are two inequivalent Dirac points that lead to two distinct valleys in photonic graphene, which could be used to control the flow of light and might be used to carry information in valley polarized beam splitter, collimator or guiding device. (C) 2014 Optical Society of America
引用
收藏
页码:23605 / 23613
页数:9
相关论文
共 36 条
[21]   Extinction of coherent backscattering by a disordered photonic crystal with a Dirac spectrum [J].
Sepkhanov, R. A. ;
Ossipov, A. ;
Beenakker, C. W. J. .
EPL, 2009, 85 (01)
[22]   Graphene-based composite materials [J].
Stankovich, Sasha ;
Dikin, Dmitriy A. ;
Dommett, Geoffrey H. B. ;
Kohlhaas, Kevin M. ;
Zimney, Eric J. ;
Stach, Eric A. ;
Piner, Richard D. ;
Nguyen, SonBinh T. ;
Ruoff, Rodney S. .
NATURE, 2006, 442 (7100) :282-286
[23]   Observation of Two-Dimensional Dynamic Localization of Light [J].
Szameit, Alexander ;
Garanovich, Ivan L. ;
Heinrich, Matthias ;
Sukhorukov, Andrey A. ;
Dreisow, Felix ;
Pertsch, Thomas ;
Nolte, Stefan ;
Tuennermann, Andreas ;
Longhi, Stefano ;
Kivshar, Yuri S. .
PHYSICAL REVIEW LETTERS, 2010, 104 (22)
[24]   Polychromatic dynamic localization in curved photonic lattices [J].
Szameit, Alexander ;
Garanovich, Ivan L. ;
Heinrich, Matthias ;
Sukhorukov, Andrey A. ;
Dreisow, Felix ;
Pertsch, Thomas ;
Nolte, Stefan ;
Tuennermann, Andreas ;
Kivshar, Yuri S. .
NATURE PHYSICS, 2009, 5 (04) :271-275
[25]   Anomalous transmission of disordered photonic graphenes at the Dirac point [J].
Wang, X. ;
Jiang, H. T. ;
Yan, C. ;
Sun, Y. ;
Li, Y. H. ;
Shi, Y. L. ;
Chen, H. .
EPL, 2013, 103 (01)
[26]   Manipulation of Electron Beam Propagation by Hetero-Dimensional Graphene Junctions [J].
Wang, Zhengfei ;
Liu, Feng .
ACS NANO, 2010, 4 (04) :2459-2465
[27]   Valley-Dependent Brewster Angles and Goos-Hanchen Effect in Strained Graphene [J].
Wu, Zhenhua ;
Zhai, F. ;
Peeters, F. M. ;
Xu, H. Q. ;
Chang, Kai .
PHYSICAL REVIEW LETTERS, 2011, 106 (17)
[28]   Valley-contrasting physics in graphene: Magnetic moment and topological transport [J].
Xiao, Di ;
Yao, Wang ;
Niu, Qian .
PHYSICAL REVIEW LETTERS, 2007, 99 (23)
[29]   Bends and splitters for self-collimated beams in photonic crystals [J].
Yu, XF ;
Fan, SH .
APPLIED PHYSICS LETTERS, 2003, 83 (16) :3251-3253
[30]   Experimental Observation of Strong Edge Effects on the Pseudodiffusive Transport of Light in Photonic Graphene [J].
Zandbergen, Sander R. ;
de Dood, Michiel J. A. .
PHYSICAL REVIEW LETTERS, 2010, 104 (04)