Optically detected nuclear magnetic resonance in amorphous silicon related materials

Optically detected nuclear magnetic resonance (ODNMR) measurements have been carried out for a-Si:H samples with different hydrogen content and for a-Si_xN_1−x:H (x = 0.01 and 0.05). We have observed for the first time the ODNMR signal of hydrogen. The ODNMR spectrum is decomposed into two Lorentzians with different widths (FWHM) which arise from the dipole-dipole interactions of a trapped hole with its nearby and distant H¹ nuclei, respectively. The trapping site of the hole is discussed based on the experimental results.