Quantum effects on propagation of bulk and surface waves in a thin quantum plasma film

•New bulk and surface plasma dispersion relations due to quantum effects are derived, in a thin quantum plasma film.•It is found that quantum effects become important for a thin quantum film of small thickness.

The propagation of bulk and surface plasma waves in a thin quantum plasma film is investigated, taking into account the quantum effects. The generalized bulk and surface plasma dispersion relation due to quantum effects is derived, using the quantum hydrodynamic dielectric function and applying appropriate additional boundary conditions. The quantum mechanical and film geometric effects on the bulk and surface modes are discussed. It is found that quantum effects become important for a thin film of small thickness.