It was mentioned earlier that the dimensions have different band structure and spectroscopy. For non-metallic solids, which are one dimensional, have optical properties that are dependent on the electronic transitions between valence and conduction bands. In addition, the spectroscopic transition probability is between the initial and final orbital and it depends on the integral. φ i is the initial orbital, φ f is the final orbital, ʃ φ f ûεφ i is the integral, ε is the electric vector, and u is the dipole moment.