@article {song2016efficient,
	title = {Efficient unidirectional launching of surface plasmons by a cascade asymmetric-groove structure},
	journal = {Nanoscale},
	volume = {8},
	year = {2016},
	pages = {6777-6782},
	publisher = {The Royal Society of Chemistry},
	url = {http://pubs.rsc.org/is/content/articlehtml/2016/nr/c6nr00342g},
	author = {Song, Xue-Yang and Zhang, Zhengxing and Huimin Liao and Li, Zhi and Sun, Chengwei and Chen, Jianjun and Qihuang Gong}
}
