11. Since each vibrational modes contributes to two quadratic terms in the Hamiltonian, you get: 12. For a linear molecule, the number of vibrational modes is: 13. Exactly as in a laser, where you have many photons in the same vibrational mode . 14. This is because for each vibrational mode , there is a potential and kinetic energy component. 15. In organic semiconductors charge carriers couple to vibrational modes and are referred to as polarons. 16. For example, proteins typically contain thousands of atoms and therefore have thousands of vibrational modes . 17. :You first need to compute the number of degrees of freedom for the vibrational modes . 18. Hence polarized Raman spectroscopy can provide detailed information as to the symmetry labels of vibrational modes . 19. These low-energy vibrational modes are basically Fourier modes, and superposition is basically . . . superposition. 20. The first is that each lattice vibrational mode is well described by a quantum harmonic oscillator.
