Gap-plasmon-enhanced NbN superconducting photon detectors at single-photon level

Yu-Jung Lu

doi:10.1117/12.3025953

3 October 2024 Gap-plasmon-enhanced NbN superconducting photon detectors at single-photon level

Yu-Jung Lu

Proceedings Volume PC13110, Active Photonic Platforms (APP) 2024; PC131101Q (2024) https://doi.org/10.1117/12.3025953
Event: Nanoscience + Engineering, 2024, San Diego, California, United States

Abstract

Here, we use a novel approach to enhance the visible-light photoresponse in NbN superconducting microwire photon detectors (SMPDs) by integrating them with gap plasmon resonators (GPRs). This talk describes how we observe the plasmonic NbN SMPDs can achieve a 233-fold enhancement in the phonon-electron interaction factor (γ) compared to pristine NbN SMPDs under resonant conditions with illumination at 532 nm. The nonlinear photoresponse in the visible region is attributed to the gap-plasmon resonances that disrupt the Copper pairs that break the superconducting state to normal. In addition, an impressive detection efficiency of 98% was achieved using these plasmonic SMPDs.

Conference Presentation

Citation Download Citation

Yu-Jung Lu "Gap-plasmon-enhanced NbN superconducting photon detectors at single-photon level", Proc. SPIE PC13110, Active Photonic Platforms (APP) 2024, PC131101Q (3 October 2024); https://doi.org/10.1117/12.3025953

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