Hi,
Here is a proposal for a spaceship, operating on plasma jet engines (rear view) and two on-board generators (front view).

The blue rays represent the criogenic power supply to the generator, 'sucking in' the energy of the vacuum (by cooling it down to the absolute zero and taking off the 'heat' - Energy 1) (just don't ask me how).
The red rays are represnting the power supply of the light generator, turning the particles of the vacuum (the matter) into light (Energy 2). E = mc2

Energy 1 and Energy 2 when mixed up in the engine make self-igniting plasma jet fuel for driving the engines of the spaceship.

Regards