@article {87556,
	title = {Point Defect Engineered Si Sub-Bandgap Light-emitting Diode},
	journal = {Optics Express},
	volume = {15},
	number = {6727},
	year = {2007},
	author = {Bao, J. and M. Tabbal and Kim, T. and S. Charnvanichborikarn and Williams, J. S. and M. J. Aziz and F. Capasso}
}
