  In this paper, we will try to explain the method of theoretical estimation of
index of refraction of an assymetric organic Electro-Optic compound called MNA
or 2,methyl,4,nitro-aniline. It is transparent in a wide range between
500nm-2000nm wavelengths. We assume a Quantum Photonic Model which is based on
Bohmian Mechanics for Electron-Photon interactions. The photons interact with
pi-electrons of MNA molecules, when they pass in the atomic layers. During this
electron-photon interaction the photon is temporarily annihilated and all of
its energy will be delivered into electron in orbit as kinetic energy in every
layer. After a short while the photon will be recreated. With reasonable and
precise calculations of these delays we may estimate theoretically Ordinary and
Extraordinary refractive indices of MNA compound. Quarter wave thickness for
MNA crystal has also been estimated according to phase retardation simulations.
Attained results from this Quantum Photonic model - Montecarlo time domain
method, is estimated to be very close to experimental quantities with errors
always less than 6 percents.
