%A %T Expression of Concern %0 Journal Article %D 2015 %J Front. Optoelectron. %J Frontiers of Optoelectronics %@ 2095-2759 %R 10.1007/s12200-014-0385-7 %P 461-461 %V 8 %N 4 %U {https://journal.hep.com.cn/foe/EN/10.1007/s12200-014-0385-7 %8 2015-11-24 %X