Nanobiotechnology Reports, Год журнала: 2024, Номер 19(S1), С. S37 - S44
Опубликована: Дек. 1, 2024
Язык: Английский
JETP Letters, Год журнала: 2025, Номер 121(1), С. 35 - 40
Опубликована: Янв. 1, 2025
Язык: Английский
Процитировано
0
Science Advances, Год журнала: 2025, Номер 11(11)
Опубликована: Март 12, 2025
We propose a mechanism for generating single photons in the mid-infrared (MIR) using solid-state or molecular quantum emitter. The scheme uses cavity electrodynamics (QED) effects to selectively enhance Frank-Condon transition, deterministically preparing Fock state of polar phonon mode. By coupling mode an antenna, resulting excitation is then radiated far field as photon with frequency matching combining macroscopic QED calculations methods from open system theory, we show that optimal parameters generate these MIR occur modest light-matter strengths, which are achievable state-of-the-art technologies. Combined, cascaded provides quasi-deterministic source heralded regime electromagnetic spectrum where this previously was not possible.
Язык: Английский
Процитировано
0
Nano Letters, Год журнала: 2025, Номер unknown
Опубликована: Июнь 2, 2025
Entangled photon pairs at telecom wavelengths are essential for quantum communication, distributed computing, and quantum-enhanced sensing. The O-band offers low chromatic dispersion fiber loss, which is ideal long-distance networks. Site-controlled nanowire dots have emerged as a promising platform generating single entangled photons, offering high extraction efficiency scalability. However, their operation has largely been restricted to the visible first near-infrared (NIR-I) windows. Here, we demonstrate bright source of in based on site-controlled dots. We measure fine-structure splitting 4.6 μeV, confirming suitability high-fidelity polarization entanglement. Quantum-state tomography biexciton-exciton cascade reveals maximum fidelity 85.8 ± 1.1% Φ+ Bell state concurrence 75.1 2.1%. This work establishes viable sources telecom, advancing scalable technologies fiber-based
Язык: Английский
Процитировано
0
Optics Express, Год журнала: 2024, Номер 32(10), С. 18257 - 18257
Опубликована: Апрель 15, 2024
We present a source of indistinguishable photons at telecom wavelength, synchronized to an external clock, for the use in distributed quantum networks. characterize indistinguishability generated independent parametric down-conversion events using Hong-Ou-Mandel interferometer, and show non-classical interference with coalescence, C = 0.83(5). also demonstrate synchronization clock within sub-picosecond timing jitter, which is significantly shorter than single-photon wavepacket duration ≈ 35 ps. Our enables scalable protocols over multi-node, long-distance optical networks network-based recovery systems.
Язык: Английский
Процитировано
2
ACS Photonics, Год журнала: 2024, Номер 11(7), С. 2738 - 2744
Опубликована: Июнь 18, 2024
Telecom C-band single photons exhibit the lowest attenuation in optical fibers, enabling long-haul, quantum-secured communication. However, efficient coupling with fibers is crucial for these to be effective carriers long-distance transmission. We demonstrate an fiber-coupled photon source telecom using InAs/InP quantum dots coupled a tapered nanobeam. The nanobeam structure facilitates directional emission that mode-matched lensed fiber, resulting collection efficiency of up 65% from single-mode fiber. Using this approach, we count rates 575 ± 5 Kcps and purity g(2) (0) = 0.015 0.003. Additionally, Hong–Ou–Mandel interference emitted visibility 0.84 0.06. From measurements, determine coherence time 450 20 ps, factor only 8.3 away lifetime limit. This work represents important step toward development single-photon sources emitting bright, pure, indistinguishable photons, which are necessary realize fiber-based networks.
Язык: Английский
Процитировано
2
Advanced Quantum Technologies, Год журнала: 2024, Номер unknown
Опубликована: Авг. 12, 2024
Abstract This perspective gives a tutorial overview of the development solid‐state quantum emitters over past three decades, focusing on key parameters that are used to assess their performance for applications in photonics. Specifically, it covers single‐photon purity and indistinguishability, source brightness, on‐demand operation. The includes brief comparison different material systems concludes with discussion challenges remain be solved.
Язык: Английский
Процитировано
2
JETP Letters, Год журнала: 2024, Номер 120(9), С. 668 - 674
Опубликована: Ноя. 1, 2024
Heterostructures with InAs/InGaAs quantum dots grown by molecular beam epitaxy on the surface of InGaAs metamorphic buffer layers a linearly graded composition profile GaAs(001) substrates have been studied X-ray diffraction, transmission electron microscopy, and, upon growth an additional quantum-dot layer structure, atomic force microscopy. The tendency to formation objects elongated along [1–10] direction (so-called dashes), caused asymmetry in migration In different crystallographic directions, is confirmed. It established that density both and dashes as high (2‒4) × 10 cm –2 . At same time, narrow lines associated emission from individual are observed spectra low-temperature ( T = K) microphotoluminescence wide wavelength range (1.30–1.55 µm). size shape estimated atomic-force microscopy data good agreement previously reported parameters demonstrated.
Язык: Английский
Процитировано
2
Nanotechnology, Год журнала: 2024, Номер 35(41), С. 415703 - 415703
Опубликована: Июль 2, 2024
Efficiently coupling single-photon emitters in the telecommunication C-band that are not deterministically positioned to photonic structures requires both spatial and spectral mapping. This study introduces photoluminescence mapping of telecom self-assembled quantum dots (QDs) by confocal laser scanning microscopy, a technique previously unexplored this wavelength range which fulfills these two requirements. We consider effects distortions inherent any imaging system but largely disregarded prior works derive accurate coordinates from maps. obtain position uncertainty below 11 nm for 10% QDs when assuming no distortions, highlighting potential approach. After distortion correction, we found determined positions on average shifted 428 corrected positions, demonstrating necessity correction positioning. Then, through error propagation, increases 110 nm.
Язык: Английский
Процитировано
1
Applied Physics Letters, Год журнала: 2024, Номер 125(25)
Опубликована: Дек. 16, 2024
The generation of single photons using solid-state quantum emitters is pivotal for advancing photonic technologies, particularly in communication. As the field continuously advances toward practical use cases and beyond shielded laboratory environments, specific demands are placed on robustness light sources during operation. In this context, process against intrinsic extrinsic effects a major challenge. Here, we present robust scheme coherent indistinguishable single-photon states with very low photon number coherence three-level system semiconductor dot. Our approach combines advantages adiabatic rapid passage stimulated two-photon excitation. We demonstrate while maintaining prime quantum-optical quality emitted state. Moreover, highlight immediate implementation various cryptographic protocols.
Язык: Английский
Процитировано
1
Optics Express, Год журнала: 2024, Номер 32(21), С. 36986 - 36986
Опубликована: Сен. 19, 2024
Integrated coherent mid-infrared (mid-IR) sources are crucial for spectroscopy and quantum frequency conversion (QFC) to facilitate scalable fiber-based application of single photons. Direct mid-IR emission with broad tunability poses fundamental challenges from the gain media mirror components. This paper presents a characterization second-order nonlinear platform. It showcases parametric source continuous tuning range exceeding 230 nm centered around 2425 nm, achieved through difference-frequency generation (DFG). The coefficient d 14 gallium arsenide (GaAs) aluminum (AlGaAs) on insulator is experimentally determined via second-harmonic (SHG) in waveguides various lengths, tolerance process investigated. These materials explored their high efficiency, utilizing monolithic epitaxial dots integrated QFC. results demonstrate efficient tunable suitable compact, emitters, applications environmental health monitoring.
Язык: Английский
Процитировано
1