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Manipulating the Brewster angles by using microscopically coherent dipole quanta and its possible implications

Traditionally, the Brewster angle is a solid property of the material in question with respect to the frequency (or color) of an incident light of proper polarization. For the material in hand, there is a one-to-one correspondence between the Brewster angle and the incident light frequency. However, this paper shows that such Brewster angle can be modified, in a postprocess manner, into a new controllable (even dynamic) variable of the host matter if a microscopic method called "dipole engineering" is employed. It is first demonstrated theoretically how the Brewster angle of the selected host matter may, in principle, be manipulated without having to get involved in the recipe or processes originally leading to the materialization the host matter. Next, numerical experiments for the p-wave case based on the first-principle quantum mechanics simulation further evidence the variation of Brewster angles rendered by the proposed method. Then, some possibilities concerning its untraditional applications are conjectured and discussed, with the null and pump-dependent Brewster angles, and the intensity-wise low-pass filters, in particular, as examples