Metasurfaces composed of two-dimensional nanopillar arrays can manipulate light fields in desirable ways and exhibit the unique advantage of beam steering.Here,we experimentally demonstrate a metasurface-based wide-an...Metasurfaces composed of two-dimensional nanopillar arrays can manipulate light fields in desirable ways and exhibit the unique advantage of beam steering.Here,we experimentally demonstrate a metasurface-based wide-angle broadband all-dielectric blazed grating with an extreme incident angle of up to 80°,which is achieved by optimizing the wide-angle phase shifts and transmissivities of the unit cells.It exhibits a maximum diffraction efficiency of 72%and a high average efficiency of 64%over a wide range of incident angles from−80° to 45° at 1.55μm.Moreover,the proposed grating has a broad bandwidth of 200 nm(1.45-1.65μm),and average efficiencies of more than 50%can be achieved experimentally over the same incidence angles.Our results may pave the way for the creation of novel and efficient flat optical devices for wavefront control.展开更多
随着EAST实验水平不断提高,用户对EAST数据采集控制系统提出了更高的要求;基于RIA(Rich Internet Applications富因特网应用程序)的EAST数据采集远程控制系统采用B/S结构:使用基于Flex的富因特网应用程序作为采集控制系统的用户界面展现...随着EAST实验水平不断提高,用户对EAST数据采集控制系统提出了更高的要求;基于RIA(Rich Internet Applications富因特网应用程序)的EAST数据采集远程控制系统采用B/S结构:使用基于Flex的富因特网应用程序作为采集控制系统的用户界面展现,采用一系列J2EE开源框架完成服务器端数据库处理;新采集控制系统在以下方面做出重大改进:多用户权限管理,远程个性化操作,针对性、实时性日志更新,友好的用户界面;测试表明新采集控制系统完全符合EAST实验数据采集的新要求。展开更多
基金support by the Advanced Integrated Optoelectronics Facility at Tianjin University
文摘Metasurfaces composed of two-dimensional nanopillar arrays can manipulate light fields in desirable ways and exhibit the unique advantage of beam steering.Here,we experimentally demonstrate a metasurface-based wide-angle broadband all-dielectric blazed grating with an extreme incident angle of up to 80°,which is achieved by optimizing the wide-angle phase shifts and transmissivities of the unit cells.It exhibits a maximum diffraction efficiency of 72%and a high average efficiency of 64%over a wide range of incident angles from−80° to 45° at 1.55μm.Moreover,the proposed grating has a broad bandwidth of 200 nm(1.45-1.65μm),and average efficiencies of more than 50%can be achieved experimentally over the same incidence angles.Our results may pave the way for the creation of novel and efficient flat optical devices for wavefront control.
文摘随着EAST实验水平不断提高,用户对EAST数据采集控制系统提出了更高的要求;基于RIA(Rich Internet Applications富因特网应用程序)的EAST数据采集远程控制系统采用B/S结构:使用基于Flex的富因特网应用程序作为采集控制系统的用户界面展现,采用一系列J2EE开源框架完成服务器端数据库处理;新采集控制系统在以下方面做出重大改进:多用户权限管理,远程个性化操作,针对性、实时性日志更新,友好的用户界面;测试表明新采集控制系统完全符合EAST实验数据采集的新要求。
