Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Plasmonic Metal-Superconductor Nanowire Single Photon Detector for On-Chip Quantum State Tomography

Pierre Brosseau, Giorgio Adamo, Jiawei Wang, Ruixiang Guo, Anton N. Vetlugin, Cesare Soci

Published Jan 1, 2026• 0 citations
Publisher

Abstract

We demonstrate a 2D detector array that integrates the single-photon sensitivity of superconducting nanowires with the polarization-selective absorption of a plasmonic structure within a unified design, enabling complete, high-fidelity on-chip quantum state tomography.
DOI
10.1364/cleo_fs.2026.fm2a.4

Related papers

Single-photon polarization tomography with an integrated metal-superconductor nanowire array

Pierre Brosseau, Jiawei Wang, Giorgio Adamo +2 more

Light polarization is a primary degree of freedom for encoding quantum information. The scaling up of photonic quantum networks and computer architecture depends crucially on its precise characterization. This is typically achieved by placing external waveplates, polarizers, moving mounts, and recently metasurfaces, on top of the detectors. All these solutions complicate integration and scaling. Here we break convention with traditional architecture and present a monolithic, self-aligned metal-superconductor nanowire single photon detector (M-SNSPD) possessing intrinsic full polarization selectivity. Gold nanowires, co-fabricated atop NbTiN superconducting nanowires within the same lithographic footprint, act as polarization-selective plasmonic metamaterials inducing resonant absorption in the NbTiN. U-shaped wires provide linear polarization selectivity, while S-shaped meanders distinguish circular polarization, while retaining the high-count rates and low dark count rates of conventional SNSPDs. By arranging them into a four-pixel array we realize simultaneous projection onto four polarizations and demonstrate continuous polarization state tomography with an ensemble average fidelity exceeding 98%. Our approach opens new avenues towards scalable detector arrays with integrated plasmonic functionalities, for single photon polarimetry, imaging and spectroscopy.

physics.opticsCross-listedarXiv:2607.06047•Jul 8, 2026•0 citations

Plasmonic structure integrated superconducting nanowire single-photon detectors for quantum information processing

Mária Csete, András Szenes, B. Tóth +3 more

Optimization of superconducting nanowire single-photon detectors integrated with plasmonic structures allows to maximize the absorptance (A-SNSPD) as well as the polarization contrast with (C-SNSPD) and without (P-SNSPD) a criterion regarding the absorptance.

OSA Advanced Photonics Congress•Jan 1, 2018•0 citations

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

Mária Csete, András Szenes, B. Toth +3 more

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.

IEEE Research and Applications of Photonics in Defense Conference (RAPID)•Aug 1, 2018•0 citations

Using Surface Plasmons to Enhance the Speed and Efficiency of Superconducting Nanowire Single-Photon Detectors

Xiaolong Hu, Eric A. Dauler, Andrew J. Kerman +4 more

We report our design and fabrication of superconducting nanowire single-photon detectors integrated with gold plasmonic nanostructures, which can enhance the absorption of TM-polarized light, and can enlarge the effective area without sacrificing detector speed.

Conference on Lasers and Electro-Optics•Jan 1, 2009•3 citations

Plasmonic structure integrated superconducting BSCCO nanowire single-photon detector compatible with He-ion lithography

András Szenes, László Pothorcki, Balázs Bánhelyi +1 more

Single-photon detection is essential for quantum communication and computing. Superconducting nanowire single-photon detectors (SNSPDs) offer high detection efficiency and fast response but require cryogenic temperatures, limiting their practical use. This study focuses on BSCCO-based SNSPDs integrated with plasmonic structures to enhance absorption and improve detection efficiency. By integrating wavelength-scaled periodic plasmonic patterns, high detection efficiency is achieved, making these detectors more suitable for real-world applications.

International Congress on Artificial Materials for Novel Wave Phenomena (Metamaterials)•Sep 1, 2025•1 citation

Superconducting nanowire single-photon detector implemented in a 2D photonic crystal cavity

Julian Münzberg, Andreas Vetter, Fabian Beutel +4 more

The combination of efficient single-photon generation, manipulation, and detection on a single chip poses a major challenge for quantum photonics and all-optical quantum computing. Among a multitude of detection technologies, waveguide-integrated superconducting nanowire single-photon detectors stand out as they promise near-unity detection efficiencies at outstanding timing accuracy and speed. Here, by exploiting the concept of critical coupling, we present the integration of a short nanowire into a two-dimensional double heterostructure photonic crystal cavity to realize an integrated single-photon detector with excellent performance metric. The complete detector characterization reveals on-chip detection efficiencies of almost 70% at telecom wavelengths, recovery times of 480 ps, and vanishingly low dark count rates. Our design paves the way for the implementation of compact on-chip detector arrays and time-multiplexed single-detector schemes.

Optica•May 16, 2018•82 citations
Light polarization is a primary degree of freedom for encoding quantum information. The scaling up of photonic quantum networks and computer architecture depends crucially on its precise characterization. This is typically achieved by placing external waveplates, polarizers, moving mounts, and recently metasurfaces, on top of the detectors. All these solutions complicate integration and scaling. Here we break convention with traditional architecture and present a monolithic, self-aligned metal-superconductor nanowire single photon detector (M-SNSPD) possessing intrinsic full polarization selectivity. Gold nanowires, co-fabricated atop NbTiN superconducting nanowires within the same lithographic footprint, act as polarization-selective plasmonic metamaterials inducing resonant absorption in the NbTiN. U-shaped wires provide linear polarization selectivity, while S-shaped meanders distinguish circular polarization, while retaining the high-count rates and low dark count rates of conventional SNSPDs. By arranging them into a four-pixel array we realize simultaneous projection onto four polarizations and demonstrate continuous polarization state tomography with an ensemble average fidelity exceeding 98%. Our approach opens new avenues towards scalable detector arrays with integrated plasmonic functionalities, for single photon polarimetry, imaging and spectroscopy.
Single-photon detection is essential for quantum communication and computing. Superconducting nanowire single-photon detectors (SNSPDs) offer high detection efficiency and fast response but require cryogenic temperatures, limiting their practical use. This study focuses on BSCCO-based SNSPDs integrated with plasmonic structures to enhance absorption and improve detection efficiency. By integrating wavelength-scaled periodic plasmonic patterns, high detection efficiency is achieved, making these detectors more suitable for real-world applications.
The combination of efficient single-photon generation, manipulation, and detection on a single chip poses a major challenge for quantum photonics and all-optical quantum computing. Among a multitude of detection technologies, waveguide-integrated superconducting nanowire single-photon detectors stand out as they promise near-unity detection efficiencies at outstanding timing accuracy and speed. Here, by exploiting the concept of critical coupling, we present the integration of a short nanowire into a two-dimensional double heterostructure photonic crystal cavity to realize an integrated single-photon detector with excellent performance metric. The complete detector characterization reveals on-chip detection efficiencies of almost 70% at telecom wavelengths, recovery times of 480 ps, and vanishingly low dark count rates. Our design paves the way for the implementation of compact on-chip detector arrays and time-multiplexed single-detector schemes.