• 文献标题:   Observation of edge solitons in photonic graphene
  • 文献类型:   Article
  • 作  者:   ZHANG ZY, WANG R, ZHANG YQ, KARTASHOV YV, LI F, ZHONG H, GUAN H, GAO KL, LI FL, ZHANG YP, XIAO M
  • 作者关键词:  
  • 出版物名称:   NATURE COMMUNICATIONS
  • ISSN:   2041-1723
  • 通讯作者地址:   Xi An Jiao Tong Univ
  • 被引频次:   8
  • DOI:   10.1038/s41467-020-15635-9
  • 出版年:   2020

▎ 摘  要

Edge states emerge in diverse areas of science, offering promising opportunities for the development of future electronic or optoelectronic devices, sound and light propagation control in acoustics and photonics. Previous experiments on edge states in photonics were carried out mostly in linear regimes, but the current belief is that nonlinearity introduces more striking features into physics of edge states, leading to the formation of edge solitons, optical isolation, making possible stable lasing in such states, to name a few. Here we report the observation of edge solitons at the zigzag edge of a reconfigurable photonic graphene lattice created via the effect of electromagnetically induced transparency in an atomic vapor cell with controllable nonlinearity. To obtain edge solitons, Raman gain is introduced to compensate strong absorption experienced by the edge state during propagation. Our observations may open the way for future experimental exploration of topological photonics on this nonlinear, reconfigurable platform.