Radiation from a dynamically deforming mirror immersed in the electromagnetic vacuum

We study photon creation by a deforming mirror immersed in the electromagnetic field. The mirror radiates photons in pairs, and twins may have opposite polarizations. However, the total (angular) spectrum of photons is the sum of the (angular) spectrum of radiation from mirrors in a scalar field subject to the Dirichlet and Neumann boundary conditions. Windows of radiation are independent of the vectorial or scalar nature of the field. For a harmonic traveling wave on the surface with a frequency ω_m and wave vector k_m, the spectrum is not symmetric with respect to ω_m/2. This asymmetry of the spectrum depends on ω_m and k_m, and is specific to the electromagnetic field.