Microtrap on a concave grating reflector for atom trapping
Zhang Hui1, Li Tao2, Yin Ya-Ling1, Li Xing-Jia1, Xia Yong1, †, , Yin Jian-Ping1
       

Schematic diagram of a three-dimensional (3D) optical focusing trapping with adding a SiO2 substrate under radially polarized illumination.