Polarizability polarized pump-probe

The result of this numerical integration is u(t), v(t) and w(t). The induced polarization P(t) s u(t) + iv(t) is numerically Fourier transformed for positive and negative frequencies, to give P(co). The computed P(m) is the polarizability induced in the two level system by the pump field as seen by a weak probe of frequency u in the rotating frame. 

To summarize, the EOM-PMA considerably facilitates the computation of various optical signals and 2D spectra. With shght alterations, the EOM-PMA can also be applied to compute nonlinear responses in the infrared (IR). The three-pulse EOM-PMA can be extended to calculate the A-pulse-induced nonhnear polarization [51], which opens the way for the interpretation of fifth-order spectroscopies, such as heterodyned 3D IR [52], transient 2D IR [53, 54], polarizability response spectroscopy [55], resonant-pump third-order Raman-probe spectroscopy [56], femtosecond stimulated Raman scattering [57], four-six-wave-mixing interference spectroscopy [58], or (higher than fifth order) multiple quantum coherence spectroscopy [59]. 

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