Molecules have a probability of direction of emission relative to their electric dipole moment, with maximum probability perpendicular to their electric dipole moment, and zero probability parallel to their electric dipole moment.

For graybody objects, there is also a probability of emission based upon the energy density gradient, with maximum probability along the steepest energy density gradient and zero probability with zero energy density gradient.

The electric dipole moment is an EM phenomenon, and the energy density gradient is an EM phenomenon... so is there some mechanism by which polyatomics attempt to align themselves with their electric dipole moment perpendicular to the steepest energy density gradient, to maximize radiative emission (even though it's likely disrupted by continual random thermal vibrations), knowing that systems always seek their lowest energy state and attempt to do so along the steepest gradient?

Sort of like how a magnet orients itself along magnetic lines of flux.

The reason I ask is if we were able to control the orientation of the electric dipole moment in a material, we could turn radiative emission off (turn the molecule so its electric dipole moment is parallel to the emitting surface) and on (turn the molecule so its electric dipole moment is perpendicular to the emitting surface). A 'heat switch'. We could also align all electric dipole moments perpendicular to the emitting surface to maximize radiant exitance.