Control of quantized photon states with external dc bias in semiconductor superlattices

We show that the Bloch oscillation in semiconductor superlattices under the external de bias is able to generate nonclassical photon states. The time development operator of the photon field in such systems is obtained and is shown to be equivalent approximately to the displacement operator, the phase-quadrature amplitude squeezing operator, or the optical Kerr operator, depending on the external de bias. Such equivalence is discussed also in terms of Stark-ladder formation. [S1050-2947(98)04402-3].