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

An NbTiN superconducting single photon detector implemented on a LiNbO3 nano-waveguide at telecom wavelength

Julien Zichi, Samuel Gyger, Mohammad Amin Baghban, Ali W. Elshaari, Katia Gallo, Val Zwiller

Published Jan 1, 2019• 0 citations
OpenAlex

Abstract

Fiber-coupled superconducting nanowire single photon detectors are a ubiquitous tool for quantum optics experiments as they offer near unity detection efficiency over a broad wavelength range, low ...

Related papers

Modelling superconducting nanowire single photon detectors in a waveguide-based resonator

Nicola A. Tyler, Jorge Barreto, Gerardo E. Villarreal-Garcia +4 more

We present the analysis of a single photon detector system capable of achieving near-unity detection efficiency. It consist of waveguide-coupled superconducting nanowires as short as 1 μm embedded in a racetrack resonator.

Conference on Lasers and Electro-Optics•Jan 1, 2016•0 citations

Design of broadband high-efficiency superconducting-nanowire single photon detectors

Luca Redaelli, Gabriele Bulgarini, Sergiy M. Dobrovolskiy +4 more

Abstract In this paper several designs to maximize the absorption efficiency of superconducting-nanowire single-photon detectors are investigated. Using a simple optical cavity consisting of a gold mirror and a SiO 2 layer, the absorption efficiency can be boosted to over 97%: this result is confirmed experimentally by the realization of an NbTiN-based detector having an overall system detection efficiency of 85% at 1.31 μ m. Calculations show that by sandwiching the nanowire between two dielectric Bragg reflectors, unity absorption (>99.9%) could be reached at the peak wavelength for optimized structures. To achieve broadband high efficiency, a different approach is considered: a waveguide-coupled detector. The calculations performed in this work show that, by correctly dimensioning the waveguide and the nanowire, polarization-insensitive detectors absorbing more than 95% of the injected photons over a wavelength range of several hundred nm can be designed. We propose a detector design making use of GaN/AlN waveguides, since these materials allow lattice-matched epitaxial deposition of Nb(Ti)N films and are transparent on a very wide wavelength range.

arXiv:1602.06846•Superconductor Science and Technology•May 6, 2016•50 citations

Modelling superconducting nanowire single photon detectors in a waveguide-based ring resonator

Gerardo E. Villarreal-Garcia, Nicola A. Tyler, Jorge Barreto +4 more

We present an analysis of a single photon detector system capable of achieving near-unity detection efficiency. It consist of waveguide-coupled superconducting nanowires as short as 1 μm embedded in a racetrack resonator.

International Conference on Numerical Simulation of Optoelectronic Devices (NUSOD)•Jul 1, 2016•0 citations

Integration of quantum emitters and detectors (Conference Presentation)

Val Zwiller, Samuel Gyger, Thomas Lettner +10 more

We develop schemes to generate, manipulate and detect single photons at various frequencies including telecom wavelengths. With detectors based on superconducting nanowires we combine very high detection efficiency with high time resolution and very low noise levels. We demonstrate on-chip implementation of single photon techniques as well as long distance implementations using deployed optical fibers.

Laser Resonators, Microresonators, and Beam Control•Mar 9, 2020•0 citations

Mid-infrared characterization of NbTiN superconducting nanowire single-photon detectors on silicon-on-insulator

Adan Azem, D. Morozov, Daniel Kuznesof +4 more

Superconducting nanowire single-photon detectors are widely used for detecting individual photons across various wavelengths from ultraviolet to near-infrared range. Recently, there has been increasing interest in enhancing their sensitivity to single photons in the mid-infrared spectrum, driven by applications in quantum communication, spectroscopy, and astrophysics. Here, we present our efforts to expand the spectral detection capabilities of U-shaped NbTiN-based superconducting nanowire single-photon detectors, fabricated in a 2-wire configuration on a silicon-on-insulator substrate, into the mid-infrared range. We demonstrate saturated internal detection efficiency extending up to a wavelength of 3.5 μm for a 5 nm thick and 50 nm wide NbTiN nanowire with a dark count rate less than 10 counts per second at 0.9 K and a rapid recovery time of 4.3 ns. The detectors are engineered for integration on waveguides in a silicon-on-insulator platform for compact, multi-channel device applications.

arXiv:2408.15959•Applied Physics Letters•Nov 18, 2024•12 citations

Waveguide superconducting single-photon detectors for integrated quantum photonic circuits

J. P. Sprengers, Alessandro Gaggero, Dondu Sahin +10 more

The monolithic integration of single-photon sources, passive optical circuits, and single-photon detectors enables complex and scalable quantum photonic integrated circuits, for application in linear-optics quantum computing and quantum communications. Here, we demonstrate a key component of such a circuit, a waveguide single-photon detector. Our detectors, based on superconducting nanowires on GaAs ridge waveguides, provide high efficiency (∼20%) at telecom wavelengths, high timing accuracy (∼60 ps), and response time in the ns range and are fully compatible with the integration of single-photon sources, passive networks, and modulators.

arXiv:1108.5107•Applied Physics Letters•Oct 31, 2011•311 citations
Abstract In this paper several designs to maximize the absorption efficiency of superconducting-nanowire single-photon detectors are investigated. Using a simple optical cavity consisting of a gold mirror and a SiO 2 layer, the absorption efficiency can be boosted to over 97%: this result is confirmed experimentally by the realization of an NbTiN-based detector having an overall system detection efficiency of 85% at 1.31 μ m. Calculations show that by sandwiching the nanowire between two dielectric Bragg reflectors, unity absorption (>99.9%) could be reached at the peak wavelength for optimized structures. To achieve broadband high efficiency, a different approach is considered: a waveguide-coupled detector. The calculations performed in this work show that, by correctly dimensioning the waveguide and the nanowire, polarization-insensitive detectors absorbing more than 95% of the injected photons over a wavelength range of several hundred nm can be designed. We propose a detector design making use of GaN/AlN waveguides, since these materials allow lattice-matched epitaxial deposition of Nb(Ti)N films and are transparent on a very wide wavelength range.
Superconducting nanowire single-photon detectors are widely used for detecting individual photons across various wavelengths from ultraviolet to near-infrared range. Recently, there has been increasing interest in enhancing their sensitivity to single photons in the mid-infrared spectrum, driven by applications in quantum communication, spectroscopy, and astrophysics. Here, we present our efforts to expand the spectral detection capabilities of U-shaped NbTiN-based superconducting nanowire single-photon detectors, fabricated in a 2-wire configuration on a silicon-on-insulator substrate, into the mid-infrared range. We demonstrate saturated internal detection efficiency extending up to a wavelength of 3.5 μm for a 5 nm thick and 50 nm wide NbTiN nanowire with a dark count rate less than 10 counts per second at 0.9 K and a rapid recovery time of 4.3 ns. The detectors are engineered for integration on waveguides in a silicon-on-insulator platform for compact, multi-channel device applications.
The monolithic integration of single-photon sources, passive optical circuits, and single-photon detectors enables complex and scalable quantum photonic integrated circuits, for application in linear-optics quantum computing and quantum communications. Here, we demonstrate a key component of such a circuit, a waveguide single-photon detector. Our detectors, based on superconducting nanowires on GaAs ridge waveguides, provide high efficiency (∼20%) at telecom wavelengths, high timing accuracy (∼60 ps), and response time in the ns range and are fully compatible with the integration of single-photon sources, passive networks, and modulators.