A dynamic Casimir effect device for moving reflective surfaces rapidly comprising: an epitaxial stack of a plurality of closely spaced semiconductor lamina; each lamina having a band gap within a range of band gaps between a low band gap value a high band gap value; and a variable voltage source capable of producing a range of output voltages that is electrically connected to the plurality of lamina; wherein each said semiconductor lamina is connected to said voltage source such that said variable voltage source can apply a range of voltages to the plurality of semiconductor lamina and wherein each said semiconductor lamina becomes a reflecting conductor when said variable voltage source applies a specific semiconductor band gap dependent voltage within said range of output voltages to said semiconductor lamina.