Pure narrowband photon-pair generation in a monolithic cavity

• URL: http://arxiv.org/abs/2602.04646v1
• Date: Wed, 04 Feb 2026 15:19:15 GMT
• Title: Pure narrowband photon-pair generation in a monolithic cavity
• Abstract summary: Photonic quantum technologies require efficient sources of pure single photons.<n>Here we present a heralded SPDC single-photon source in a monolithic cavity optimized for high spectral and spatial purity.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Photonic quantum technologies require efficient sources of pure single photons. Here we present a heralded SPDC single-photon source in a monolithic cavity optimized for high spectral and spatial purity. The source heralds single-photons at a wavelength of 1540 nm and a spectral bandwidth of 168 MHz with a maximum heralding efficiency of 84%, while keeping the multi-photon contamination below 3%. The cavity enhancement generates photons mainly in the central cavity mode with 96.2% spectral purity.

Related papers

• Optimised spectral purity of unfiltered photons via pump and nonlinearity shaping [31.576375158481827]
  Photonic quantum technologies rely on efficient generation and interference of indistinguishable photons.<n>We show high two-photon interference using only moderate bandpass spectral filtering.
  arXiv  Detail & Related papers  (2025-10-07T17:52:16Z)
• Optimized Spectral Purity of Heralded Single Photons at the Telecom O-Band [0.0]
  We numerically searched for various group-velocity-matching conditions and corresponding optimal poling structures of a potassium titanyl phosphate crystal.<n>Our poling optimization results using phase-matching coherence-length and sub-coherence-length modulation schemes show > 99.4% spectral purity with pump wavelengths ranging from 603.8 nm to 887.3 nm.<n>This study will pave the way for developing practical quantum sources for quantum information applications at the telecom O-band.
  arXiv  Detail & Related papers  (2025-01-24T03:43:19Z)
• Site-Controlled Purcell-Induced Bright Single Photon Emitters in Hexagonal Boron Nitride [62.170141783047974]
  Single photon emitters hosted in hexagonal boron nitride (hBN) are essential building blocks for quantum photonic technologies that operate at room temperature. We experimentally demonstrate large-area arrays of plasmonic nanoresonators for Purcell-induced site-controlled SPEs. Our results offer arrays of bright, heterogeneously integrated quantum light sources, paving the way for robust and scalable quantum information systems.
  arXiv  Detail & Related papers  (2024-05-03T23:02:30Z)
• Tunable quantum dots in monolithic Fabry-Perot microcavities for high-performance single-photon sources [13.880332867320176]
  Cavity-enhanced single quantum dots (QDs) are the main approach towards ultra-high-performance solid-state quantum light sources. Here we have successfully integrated miniaturized Fabry-Perot microcavities with a piezoelectric actuator. We have demonstrated a bright single photon source derived from a deterministically coupled QD within this microcavity.
  arXiv  Detail & Related papers  (2023-09-24T15:06:47Z)
• Purcell enhancement of single-photon emitters in silicon [68.8204255655161]
  Individual spins that are coupled to telecommunication photons offer unique promise for distributed quantum information processing. We implement such an interface by integrating erbium dopants into a nanophotonic silicon resonator. We observe optical Rabi oscillations and single-photon emission with a 78-fold Purcell enhancement.
  arXiv  Detail & Related papers  (2023-01-18T19:38:38Z)
• Bright, low-noise source of single photons at 780 nm with improved phase-matching in rubidium vapor [0.0]
  We demonstrate a bright multiplexed source of indistinguishable single photons with tunable GHz-bandwidth based on four-wave-mixing in rubidium vapor. The new implementation employs a frequency-detuning regime that is better phase matched, a spatial-alignment procedure using single-mode fibers, a different rubidium isotope, and higher vapor-cell transmission. Our source produces single photons with detected efficiency of over 20%, Hong-Ou-Mandel interference visibility of 88%, generation rate of over 100 kilo-counts per second, and signal-to-noise ratio greater than 100, making it suitable for quantum information
  arXiv  Detail & Related papers  (2023-01-15T09:05:16Z)
• On-chip quantum information processing with distinguishable photons [55.41644538483948]
  Multi-photon interference is at the heart of photonic quantum technologies. Here, we experimentally demonstrate that detection can be implemented with a temporal resolution sufficient to interfere photons detuned on the scales necessary for cavity-based integrated photon sources. We show how time-resolved detection of non-ideal photons can be used to improve the fidelity of an entangling operation and to mitigate the reduction of computational complexity in boson sampling experiments.
  arXiv  Detail & Related papers  (2022-10-14T18:16:49Z)
• High quality entanglement distribution through telecommunication fiber using near-infrared non-degenerate photon pairs [73.4643018649031]
  In urban environments, the quantum channel in the form of telecommunication optical fiber (confirming to ITU G.652D standards) are available. We investigate the possibility that for campus-type communications, entangled photons prepared in the Near-Infrared Range (NIR) can be transmitted successfully.
  arXiv  Detail & Related papers  (2022-09-09T03:23:11Z)
• Ultrabright and narrowband intra-fiber biphoton source at ultralow pump power [51.961447341691]
  Nonclassical photon sources of high brightness are key components of quantum communication technologies. We here demonstrate the generation of narrowband, nonclassical photon pairs by employing spontaneous four-wave mixing in an optically-dense ensemble of cold atoms within a hollow-core fiber.
  arXiv  Detail & Related papers  (2022-08-10T09:04:15Z)
• Tunable quantum photonics platform based on fiber-cavity enhanced single photon emission from two-dimensional hBN [52.915502553459724]
  In this work we present a hybrid system consisting of defect centers in few-layer hBN grown by chemical vapor deposition and a fiber-based Fabry-Perot cavity. We achieve very large cavity-assisted signal enhancement up to 50-fold and equally strong linewidth narrowing owing to cavity funneling. Our work marks an important milestone for the deployment of 2D materials coupled to fiber-based cavities in practical quantum technologies.
  arXiv  Detail & Related papers  (2020-06-23T14:20:46Z)
• Near-ideal spontaneous photon sources in silicon quantum photonics [55.41644538483948]
  Integrated photonics is a robust platform for quantum information processing. Sources of single photons that are highly indistinguishable and pure, that are either near-deterministic or heralded with high efficiency, have been elusive. Here, we demonstrate on-chip photon sources that simultaneously meet each of these requirements.
  arXiv  Detail & Related papers  (2020-05-19T16:46:44Z)
• High spectro-temporal purity single-photons from silicon micro-racetrack resonators using a dual-pulse configuration [0.0]
  Single-photons with high spectro-temporal purity are an essential resource for quantum photonic technologies. We have experimentally generated and observed single-photons with 98.0+-0.3 % spectro-temporal purity using a conventional micro racetrack resonator and an engineered dual pump pulse.
  arXiv  Detail & Related papers  (2020-04-27T20:46:06Z)

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.