It has been demonstrated that a quantum well with homogeneous, optically excited oscillations of a two-dimensional electron plasma exhibits a photonic-time-crystal-like Floquet scattering when exposed to an obliquely incident, weak electromagnetic probe wave. The hydrodynamic approximation is used to describe self-consistently the interaction between the probe wave and the 2D plasma. Such a quantum well becomes a polychromatic source and to the first order in perturbation reflected and transmitted radiation reveals as nonshifted in frequency principal components along with up- and downshifted in frequency satellites. The downshifted satellites are backward propagating when the frequency of the probe wave is less than that of the plasma oscillations. We found the condition when the downshifted components are the surface waves. For the $s$-polarized probe wave, we found that the laser-driven quantum well can support propagation of transverse electric (TE) surface wave, which would not normally be permitted to propagate freely. The amplitudes of the reflected and transmitted components are determined for the principal components and the up- and downshifted satellites.

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• Photonics
• Plasmonics
• Time crystals
• Floquet systems
• Photonic crystals
• Quantum wells
• Two-dimensional electron system
• Terahertz techniques