| Energy resolution and sensitivity of a superconducting quantum detector (2007) | |||||||||||||
Abstract | |||||||||||||
| Single-photon detectors from thin niobium nitride nanostrips show moderate energy resolution along with the cut-off of the quantum efficiency in the near-infrared spectral range. To describe the response beyond the cut-off we combine the previously developed hot-spot model with the photon-induced unbinding of the vortex-antivortex pairs which appear in the superconducting film below the Kosterlitz-Thauless phase transition. | |||||||||||||
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