We study the electronic structure of magnetic and nonmagnetic quantum corrals embedded in two-dimensional $s$-wave superconductors. We demonstrate that a quantum mirage of an impurity bound state is projected from the occupied into the empty focus of a nonmagnetic quantum corral via the excitation of the corral’s eigenmodes. We show that quantum corrals provide a new tool for manipulating the interaction between magnetic impurities by exciting oscillations in the corral’s impurity potential. Finally, we discuss the form of eigenmodes in magnetic quantum corrals.

• Received 16 April 2003

DOI:https://doi.org/10.1103/PhysRevLett.92.107006