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Localization and delocalization of light in photonic moire lattices 期刊论文
NATURE, 2020, 577 (7788) : 42-+
作者:  Wang, Peng;  Zheng, Yuanlin;  Chen, Xianfeng;  Huang, Changming;  Kartashov, Yaroslav V.;  Torner, Lluis;  Konotop, Vladimir V.;  Ye, Fangwei
收藏  |  浏览/下载:11/0  |  提交时间:2020/07/03

Moire lattices consist of two superimposed identical periodic structures with a relative rotation angle. Moire lattices have several applications in everyday life, including artistic design, the textile industry, architecture, image processing, metrology and interferometry. For scientific studies, they have been produced using coupled graphene-hexagonal boron nitride monolayers(1,2), graphene-graphene layers(3,4) and graphene quasicrystals on a silicon carbide surface(5). The recent surge of interest in moire lattices arises from the possibility of exploring many salient physical phenomena in such systems  examples include commensurable-incommensurable transitions and topological defects(2), the emergence of insulating states owing to band flattening(3,6), unconventional superconductivity(4) controlled by the rotation angle(7,8), the quantum Hall effect(9), the realization of non-Abelian gauge potentials(10) and the appearance of quasicrystals at special rotation angles(11). A fundamental question that remains unexplored concerns the evolution of waves in the potentials defined by moire lattices. Here we experimentally create two-dimensional photonic moire lattices, which-unlike their material counterparts-have readily controllable parameters and symmetry, allowing us to explore transitions between structures with fundamentally different geometries (periodic, general aperiodic and quasicrystal). We observe localization of light in deterministic linear lattices that is based on flatband physics(6), in contrast to previous schemes based on light diffusion in optical quasicrystals(12), where disorder is required(13) for the onset of Anderson localization(14) (that is, wave localization in random media). Using commensurable and incommensurable moire patterns, we experimentally demonstrate the twodimensional localization-delocalization transition of light. Moire lattices may feature an almost arbitrary geometry that is consistent with the crystallographic symmetry groups of the sublattices, and therefore afford a powerful tool for controlling the properties of light patterns and exploring the physics of periodic-aperiodic phase transitions and two-dimensional wavepacket phenomena relevant to several areas of science, including optics, acoustics, condensed matter and atomic physics.


  
Reply to: Why fossil fuel producer subsidies matter 期刊论文
NATURE, 2020, 578 (7793) : E5-E7
作者:  Wang, Peng;  Zheng, Yuanlin;  Chen, Xianfeng;  Huang, Changming;  Kartashov, Yaroslav V.;  Torner, Lluis;  Konotop, Vladimir V.;  Ye, Fangwei
收藏  |  浏览/下载:24/0  |  提交时间:2020/05/13
A predator-prey interaction between a marine Pseudoalteromonas sp. and Gram-positive bacteria 期刊论文
NATURE COMMUNICATIONS, 2020, 11 (1)
作者:  Tang, Bai-Lu;  Yang, Jie;  Chen, Xiu-Lan;  Wang, Peng;  Zhao, Hui-Lin;  Su, Hai-Nan;  Li, Chun-Yang;  Yu, Yang;  Zhong, Shuai;  Wang, Lei;  Lidbury, Ian;  Ding, Haitao;  Wang, Min;  McMinn, Andrew;  Zhang, Xi-Ying;  Chen, Yin;  Zhang, Yu-Zhong
收藏  |  浏览/下载:14/0  |  提交时间:2020/05/13
El Nino-East Asian monsoon teleconnection and its diversity in CMIP5 models 期刊论文
CLIMATE DYNAMICS, 2019, 53: 6417-6435
作者:  Wang, Peng;  Tam, Chi-Yung;  Xu, Kang
收藏  |  浏览/下载:1/0  |  提交时间:2019/11/27
Eastern-Pacific El Nino  Central-Pacific El Nino  East Asian summer monsoon  El Nino-EASM teleconnection  CMIP5  
Multiyear Ground-Based Measurements of Aerosol Optical Properties and Direct Radiative Effect Over Different Surface Types in Northeastern China 期刊论文
JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES, 2018, 123 (24) : 13887-13916
作者:  Zhao, Hujia;  Che, Huizheng;  Xia, Xiangao;  Wang, Yaqiang;  Wang, Hong;  Wang, Peng;  Ma, Yanjun;  Yang, Hongbin;  Liu, Yuche;  Wang, Yangfeng;  Gui, Ke;  Sun, Tianze;  Zheng, Yu;  Zhang, Xiaoye
收藏  |  浏览/下载:13/0  |  提交时间:2019/04/09
aerosol optical properties  aerosol direct radiative effect  aerosol type  northeastern China  
Exploring the impacts of regional unbalanced carbon tax on CO2 emissions and industrial competitiveness in Liaoning province of China 期刊论文
ENERGY POLICY, 2018, 113: 9-19
作者:  Li, Zhaoling;  Dai, Hancheng;  Sun, Lu;  Xie, Yang;  Liu, Zhu;  Wang, Peng;  Yabar, Helmut
收藏  |  浏览/下载:4/0  |  提交时间:2019/04/09
Carbon tax  Nationally determined contributions (NDCs)  Computable general equilibrium model  Liaoning in China  
Influence of watershed topographic and socio-economic attributes on the climate sensitivity of global river water quality 期刊论文
ENVIRONMENTAL RESEARCH LETTERS, 2017, 12 (10)
作者:  Khan, Afed U.;  Jiang, Jiping;  Wang, Peng;  Zheng, Yi
收藏  |  浏览/下载:6/0  |  提交时间:2019/04/09
climate elasticity of water quality  instability  fertilizer  manure  climate class  river