@article {4445,
	title = {Efficient frequency conversion based on electromagnetically induced transparency},
	journal = {Optics Letters},
	volume = {46, 681(2021)},
	year = {2021},
	author = {C-Y Cheng and Z-Y Liu and P-S Hu and T-N Wang and C-Y Chien and J-S Shiu and Yu, I. A. and Y.-C. Chen and Y.-F. Chen}
}
