Plasmonic Structure Integrated Superconducting Nano Wire Single-Photon Detectors for Transfering Specific Quantum Information

Superconducting nanowire single-photon detectors integrated with plasmonic structures and optimized to maximize the absorptance (A-SNSPD), the polarization contrast (P-SNSPD), and the product of them without (AP-SNSPD) and with (APC1/APC3) absorptance criterion proves that the most efficient read-out of encoded quantum information is possible via APC-SNSPDs.