Zhu Gui-Xin, Yu Tian-Bao, Chen Shu-Wen, Shi Zhe, Hu Shu-Juan, Lai Zhen-Quan, Liao Qing-Hua, Huang Yong-Zhen. A new way of uniform splitting of the optical power by directional coupling between the photonic crystal waveguidesJ. Acta Physica Sinica, 2009, 58(2): 1014-1019. DOI: 10.7498/aps.58.1014