Tunable polarization-entangled near-infrared photons from orthogonal GaAs nanowires

• URL: http://arxiv.org/abs/2512.02980v1
• Date: Tue, 02 Dec 2025 17:59:35 GMT
• Title: Tunable polarization-entangled near-infrared photons from orthogonal GaAs nanowires
• Abstract summary: GaAs nanowires are a new nanoscale platform to control the quantum state at telecommunication wavelength.<n>We demonstrate that a pair of GaAs nanowires constitutes a new nanoscale platform to control the quantum state at telecommunication wavelength.
• Score: 28.682925807395694
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum entanglement is a fundamental resource for emerging quantum technologies, enabling secure communication and enhanced sensing. For decades, generating polarization entangled states has been mainly achieved using bulk crystals with spontaneous parametric down conversion (SPDC), preventing scalability and on-chip integration. Miniaturizing the quantum source provides access to more versatility and tunability while enabling an easier integration to other devices, notably necessary for satellite-based quantum communication, and eventually reducing fabrication costs. This challenging task can be achieved with Zinc Blende GaAs nanowires. They already have shown an efficient photon pairs generation via SPDC at 1550 nm. Here we demonstrate that a pair of orthogonal GaAs nanowires constitutes a new nanoscale platform to control the quantum state at telecommunication wavelength, enabling a transition from polarization entangled to separable states as a function of the pump polarization, with fidelities reaching 90%

Related papers

• Deep-Learning-Designed AlGaAs Interface Linking Trapped Ions to Telecom Quantum Networks [0.0]
  A quantum internet requires efficient light-matter interfaces that map stationary qubits onto photonic carriers for long-distance transmission.<n>We develop a transversely pumped AlGaAs waveguide microcavity that produces polarization-entangled photon pairs in distinct spatial modes and frequency channels.<n>This device establishes a direct photonic interface between trapped-ion qubits and long-haul fiber networks, providing a scalable pathway toward hybrid quantum network architectures.
  arXiv  Detail & Related papers  (2026-03-13T09:46:03Z)
• Integrated polarization-entangled photon source for wavelength-multiplexed quantum networks [49.82426139329382]
  We present a simple yet high-performance on-chip polarization-entangled photon-pair source on thin-film lithium niobate (TFLN)<n>Our device employs dual quasi-phase matching (D-QPM) that sequentially supports type-0 and type-I spontaneous parametric down-conversion in a single nanophotonic waveguide.<n>We realize wavelength-multiplexed entanglement distribution in a four-user quantum network deployed over metropolitan fiber links up to 50 km.
  arXiv  Detail & Related papers  (2025-11-27T18:30:01Z)
• Purcell enhanced and tunable single-photon emission at telecom wavelengths from InAs quantum dots in circular photonic crystal resonators [0.06819010383838325]
  We fabricate and characterize photonic structures incorporating hole gratings that efficiently support charge carrier transport.<n>We report bright, Purcell-enhanced single-photon emission in the telecom C-band under above-band and phonon-assisted excitation.<n>We present electrically contacted resonators, demonstrating wide range tuneability of quantum dot transitions in the telecom O-band.
  arXiv  Detail & Related papers  (2025-05-16T10:03:54Z)
• Electrically Reconfigurable NbOCl$_2$ Metasurface for Quantum Technologies [0.0]
  Entangled photon-pair sources are foundational to advancing quantum technologies, including secure communication, quantum sensing, and imaging.<n>Here, we present an electrically entangled photon-pair source utilizing a nanostructured NbOCl$$ crystal, engineered for operation in the telecommunication C-band.
  arXiv  Detail & Related papers  (2025-05-06T09:11:56Z)
• Bandwidth-tunable Telecom Single Photons Enabled by Low-noise Optomechanical Transduction [45.37752717923078]
  Single-photon sources are of fundamental importance to emergent quantum technologies. Nano-structured optomechanical crystals provide an attractive platform for single photon generation. Optical absorption heating has thus far prevented these systems from being widely used in practical applications.
  arXiv  Detail & Related papers  (2024-10-14T18:00:00Z)
• All-optical modulation with single-photons using electron avalanche [66.27103948750306]
  We demonstrate all-optical modulation enabled by electron avalanche process in silicon.<n>Our approach opens the possibility of gigahertz-speed, and potentially even faster, optical switching at the single-photon level.
  arXiv  Detail & Related papers  (2023-12-18T20:14:15Z)
• Strongly Coupled Spins of Silicon-Vacancy Centers Inside a Nanodiamond with Sub-Megahertz Linewidth [43.06643088952006]
  electron spin of a color center in diamond mediates interaction between a long-lived nuclear spin and a photon. We demonstrate strong coupling of its electron spin, while the electron spin's decoherence rate remained below 1 MHz. We furthermore demonstrate multi-spin coupling with the potential to establish registers of quantum memories in nanodiamonds.
  arXiv  Detail & Related papers  (2023-12-14T14:17:35Z)
• A Tunable Transition Metal Dichalcogenide Entangled Photon-Pair Source [0.44310499312279367]
  Entangled photon-pair sources are at the core of quantum applications like quantum key distribution, sensing, and imaging. Here, we realize a cubic micrometer scale entangled photon-pair source in a 3R-stacked transition metal dichalcogenide crystal.
  arXiv  Detail & Related papers  (2023-11-27T17:57:58Z)
• Room Temperature Fiber-Coupled single-photon devices based on Colloidal Quantum Dots and SiV centers in Back Excited Nanoantennas [91.6474995587871]
  Directionality is achieved with a hybrid metal-dielectric bullseye antenna. Back-excitation is permitted by placement of the emitter at or in a sub-wavelength hole positioned at the bullseye center.
  arXiv  Detail & Related papers  (2023-03-19T14:54:56Z)
• Multidimensional cluster states using a single spin-photon interface coupled strongly to an intrinsic nuclear register [48.7576911714538]
  Photonic cluster states are a powerful resource for measurement-based quantum computing and loss-tolerant quantum communication. We propose the generation of multi-dimensional lattice cluster states using a single, efficient spin-photon interface coupled strongly to a nuclear register.
  arXiv  Detail & Related papers  (2021-04-26T14:41:01Z)
• Single photon emission from individual nanophotonic-integrated colloidal quantum dots [45.82374977939355]
  Solution processible colloidal quantum dots hold great promise for realizing single-photon sources embedded into scalable quantum technology platforms. We report on integrating individual colloidal core-shell quantum dots into a nanophotonic network that allows for excitation and efficient collection of single-photons via separate waveguide channels.
  arXiv  Detail & Related papers  (2021-04-23T22:14:17Z)
• High-Speed Tunable Microcavities Coupled to Rare-Earth Quantum Emitters [0.0]
  Lithium niobate on insulator (LNOI) is an emerging platform for on-chip photonics. We incorporate single rare-earth ions (REI) quantum emitters in electro-optical tunable lithium niobite (LN) thin films. We demonstrate control of LN microcavities coupled to REI over a frequency range of 160 GHz with 5 mus switching speed.
  arXiv  Detail & Related papers  (2021-04-01T10:49:00Z)
• Hybrid quantum photonics based on artificial atoms placed inside one hole of a photonic crystal cavity [47.187609203210705]
  Hybrid quantum photonics with SiV$-$-containing nanodiamonds inside one hole of a one-dimensional, free-standing, Si$_3$N$_4$-based photonic crystal cavity is presented. The resulting photon flux is increased by more than a factor of 14 as compared to free-space. Results mark an important step to realize quantum network nodes based on hybrid quantum photonics with SiV$-$- center in nanodiamonds.
  arXiv  Detail & Related papers  (2020-12-21T17:22:25Z)
• Single Photon Sources with Near Unity Collection Efficiencies by Deterministic Placement of Quantum Dots in Nanoantennas [3.6654842121350257]
  We present a method for directly locating single free-standing quantum emitters with high spatial accuracy. We also employ non-blinking, high quantum yield quantum dots (QDs) for on-demand single-photon emission. Taken together this approach results in a record-high collection efficiency of 85% of the single photons into a low NA of 0.5.
  arXiv  Detail & Related papers  (2020-05-23T15:05:23Z)

This list is automatically generated from the titles and abstracts of the papers in this site.

This site does not guarantee the quality of this site (including all information) and is not responsible for any consequences.