Resonant Raman Scattering in amorphous bulk selenium

The resonant Raman spectrum of a-Se bulk has been observed in the low frequency region and in the range of the wavelength 5145-6328 Å. The maximum of the resonance is centered at 5998 Å and shows a sharp peak at 31 cm−1 Stokes shift, whose intensity varies with wavelength. The experimental data were interpreted, and related to the behaviour of the derivative of the dielectric function in the same material.