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

(a) Schematic diagram of an HCG focusing dielectric-ring reflector. (b) Reflection phase-difference for focal length L = 10.5 μm.