Spectral resolution of superconducting single photon detectors more than doubled

Scientist use superconducting detectors (MKIDs) to capture single photons coming from exoplanets. MKIDs constantly monitor their own kinetic inductance, which changes proportionally to the energy of an incoming photon. Researchers from SRON Netherlands Institute for Space Research have now more than doubled their spectral resolution by re-trapping most of the leaked energy. The research was published in Physical Review Applied.