Quantum Fabry-Perot Resonator: Extreme Angular Selectivity in Matter-Wave Tunneling
Constantinos A. Valagiannopoulos · Physical Review Applied · 2019
The simple quantum setup of the Fabry-Perot interferometer from optics is found to exhibit very strong directional preference for impinging particle beams. Two types of resonances are identified, the different mechanisms of which are demonstrated through the spatial distribution of wave-function magnitude and probability current. These findings offer additional degrees of freedom when designing architectures for a broad range of quantum engineering applications involving beam tunneling, from e-beam steering to matter-wave filtering and quantum sensing. They also provide a set of limits for the angular selectivity that can be achieved with the considered geometry.