Lop-sided Raman-Nath diffraction in PT-antisymmetric atomic lattices Shui, Tao ; Yang, Wen-Xing ; Li, Ling ; Wang, Xin Abstract Publication: Optics Letters Pub Date: April 2019 DOI: 10.1364/OL.44.002089 Bibcode: 2019OptL...44.2089S