Aspheric lens design proposal for near-perfect mode-matching of a broadband quantum dot micropillar to a single-mode fibre

• URL: http://arxiv.org/abs/2508.06223v1
• Date: Fri, 08 Aug 2025 11:06:42 GMT
• Title: Aspheric lens design proposal for near-perfect mode-matching of a broadband quantum dot micropillar to a single-mode fibre
• Authors: Yichen Zhang, David Dlaka, James McDougall, James Y Tai, Petros Androvitsaneas, Edmund Harbord, Ruth Oulton, Andrew B. Young,
• Abstract summary: We show that aspheric SiO2 microlens can decrease the mode-matching losses to a SMF from 83.1% to 0.1(0.1)%.<n>This can result in a single photon source design with 96.4(0.1)% end-to-end efficiency, paving the way for scalable photonic quantum technologies.
• Score: 1.3113705135726432
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Quantum dots in micropillars are one of the most promising options for a bright, deterministic single photon source. While highly efficient devices (>95%) have been designed, there remains a significant bottleneck that impacts the overall system efficiency: the large numerical aperture of the output mode. This leads to inefficient coupling of emitted photons into single-mode fibre, thus limiting practical integration into quantum computing and communication architectures. We show that with the addition of a well designed aspheric SiO2 microlens we can decrease the mode-matching losses to a SMF from 83.1% to <0.1(0.1)%. This can result in a single photon source design with 96.4(0.1)% end-to-end efficiency, paving the way for scalable photonic quantum technologies.

Related papers

• Efficient and compact quantum network node based on a parabolic mirror on an optical chip [0.0]
  We demonstrate a neutral atom networking node that combines high photon collection efficiency with high atom photon entanglement fidelity.<n>A parabolic mirror is used both to form the trap and to collect fluorescence from a single rubidium atom.<n>Our results establish a robust, cavity free neutral atom interface that operates near the limit set by the collection optics numerical aperture.
  arXiv  Detail & Related papers  (2026-01-19T22:07:31Z)
• 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)
• 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)
• Enhanced Photon Routing Beyond the Blockade Limit Via Linear Optics [0.0]
  Directing indistinguishable photons from one input port into separate output ports is a fundamental operation in quantum information processing. We show that a linear optical unitary transformation applied after the atom enables splitting efficiencies that exceed this time-energy limit.
  arXiv  Detail & Related papers  (2023-05-01T22:50:51Z)
• 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)
• 'Sawfish' Photonic Crystal Cavity for Near-Unity Emitter-to-Fiber Interfacing in Quantum Network Applications [0.0]
  We develop a waveguide-integrated 'Sawfish' photonic crystal cavity and use finite element simulations to demonstrate that our system transfers, with 97.4% efficiency, the zero-phonon line emission of a negatively-charged tin vacancy center in diamond adiabatically to a single-mode fiber. Our corrugation-based design proves robust under state-of-the-art nanofabrication parameters, maintaining an emitter-to-fiber coupling efficiency of 88.6%.
  arXiv  Detail & Related papers  (2022-10-10T14:00:39Z)
• On-chip single-photon subtraction by individual silicon vacancy centers in a laser-written diamond waveguide [48.7576911714538]
  Laser-written diamond photonics offers three-dimensional fabrication capabilities and large mode-field diameters matched to fiber optic technology. To realize large cooperativities, we combine excitation of single shallow-implanted silicon vacancy centers via large numerical aperture optics. We demonstrate single-emitter extinction measurements with a cooperativity of 0.153 and a beta factor of 13% yielding 15.3% as lower bound for the quantum efficiency of a single emitter.
  arXiv  Detail & Related papers  (2021-11-02T16:01:15Z)
• Fiber-compatible photonic feed-forward with 99% fidelity [0.0]
  We present a fiber-compatible scheme for measurement and feed-forward. Our methods are useful for photonic quantum experiments including computing, communication, and teleportation.
  arXiv  Detail & Related papers  (2020-09-16T18:01:01Z)
• A bright and fast source of coherent single photons [46.25143811066789]
  A single photon source is a key enabling technology in device-independent quantum communication. We report a single photon source with an especially high system efficiency.
  arXiv  Detail & Related papers  (2020-07-24T17:08:46Z)
• 3D printed micro-optics for quantum technology: Optimized coupling of single quantum dot emission into a single mode fiber [0.0]
  Future quantum technology relies crucially on building quantum networks with high fidelity. To achieve this goal, it is of utmost importance to connect single quantum systems in a way such that their emitted single-photons overlap with the highest possible degree of coherence. Here we present an advanced manufacturing approach to accomplish this task: we combine 3D printed complex micro-optics such as hemispherical and Weierstrass solid immersion lenses.
  arXiv  Detail & Related papers  (2020-07-13T13:29:55Z)
• 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)
• Efficient fiber in-line single photon source based on colloidal single quantum dots on an optical nanofiber [0.0]
  We show that a charged state (trion) of the single quantum dot exhibits a photo-stable emission of single photons with high quantum efficiency. The device can be easily integrated to the fiber networks paving the way for potential applications in quantum networks.
  arXiv  Detail & Related papers  (2020-03-13T05:12:38Z)

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.