Far field radiation pattern under tight focusing condition is investigated in
Coherent Anti-stokes Raman Scattering (CARS) microscopy both in the forward
(F-CARS) and backward (E-CARS) directions. While we assume no refraction index
mismatch between the sample and the environing medium, our rigorous numerical
electromagnetic computation takes into account the exact polarizations of the
excitation laser beams and of the induced nonlinear dipoles. F-CARS and E-CARS
radiation patterns, as well as their divergence, are studied as a function of
the size of the sample object and compared to the excitation beams