Calculation Of Frequency-dependent Hyperpolarizabilities
Computation of dynamical electric-dipole first hyperpolarizabilities is requested via the following keywords
For the general hyperpolarizability ß(-wy-wz;wy,wz)
For a second-harmonic-generation (SHG) hyperpolarizability ß(-2w;w,w)
For an optical-rectification (OR) hyperpolarizability ß(0;w,-w)
An additional %frequency section is required in the ZMAT file, which should contain for a general hyperpolarizability two frequencies and for SHG and OR hyperpolarizablities a single frequency.
Currently this is only available for CCSD and with no orbital relaxation (DIFF_TYPE=UNRELAXED) and is not available for ABCDTYPE=AOBASIS.