Raman investigation of ro-vibrational modes of interstitial H2 in Si

A Raman scattering study of ro-vibrational transitions Q(J) of the interstitial H₂ in Si is presented. It is shown that the Q(2) mode of para hydrogen is coupled to the TA_X phonon of Si. The mode appears in the spectra at temperatures above 200 K. The results presented also suggest that the Q  (3) transition of ortho hydrogen is resonantly coupled to the O_Γ$O_{\Gamma }$ phonon.