...What you've got here, once you cut away all the goofy stuff, is a one-way mirror. Which, without the input of outside energy, is a violation of the third law of thermodynamics. Without a Maxwellian daemon to shove light through in the preferred direction, the thrust vector will be invariably random and thus zero.Plus, the ambient flux even in space isn't nearly enough to get any significant thrust this way.
My aim here is to cleanse the concept of any perceived "fringe" or taint of pseudoscience. Any advice along those lines would be greatly appreciated. ...
The device and whatever is attached to it, can be variously described as becoming "weightless", or as emitting photon "thrust". Either way, the effect of gravity is controlled.
...pumping light at capacity, at a rate itself approaching the speed of light, or at least in the femtosecond range.
Still another way of looking at it is as reloading hydrogen with photon fuel. Rocket fuel is mostly light bursting out of hydrogen. This simply contains the hydrogen and reloads it. It could also be seen along the lines of "ballast", manipulating mass in a gravitational field.