RT Journal T1 Holographic fabrication of octagon graded photonic super-crystal and potential applications in topological photonics A1 Oliver SALE, Safaa HASSAN, Noah HURLEY, Khadijah ALNASSER, Usha PHILIPOSE, Hualiang ZHANG, Yuankun LIN PB Front. Optoelectron. FD 2020-03-15 YR 2020 JF Frontiers of Optoelectronics JO Front. Optoelectron. VO 13 IS 1 SP 12 DO 10.1007/s12200-019-0941-2 K1 2D photonic crystal;graded photonic super-crystal;holographic fabrication;photonic band structure LK {https://journal.hep.com.cn/foe/EN/article/article_25620.shtml}