High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings

• URL: http://arxiv.org/abs/2212.04883v1
• Date: Fri, 9 Dec 2022 14:37:30 GMT
• Title: High-performance designs for fiber-pigtailed quantum-light sources based on quantum dots in electrically-controlled circular Bragg gratings
• Authors: Lucas Rickert, Fridtjof Betz, Matthias Plock, Sven Burger, and Tobias Heindel
• Abstract summary: We present a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation. The proposed high-performance designs combine hCBGs with a dielectric planarization and a transparent contact material. Especially the proposed designs for the telecom range prove robust and can sustain expected fiber efficiencies of more than $(82.2pm4.1)+2.2_-5.5$%.
• Score: 0.0
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: We present a numerical investigation of directly fiber-coupled hybrid circular Bragg gratings (CBGs) featuring electrical control for operation in the application relevant wavelength regimes around 930 nm as well as the telecom O- and C-band. We use a surrogate model combined with a Bayesian optimization approach to perform numerical optimization of the device performance which takes into account robustness with respect to fabrication tolerances. The proposed high-performance designs combine hCBGs with a dielectric planarization and a transparent contact material, enabling >86% direct fiber coupling efficiency (up to >93% efficiency into NA 0.8) while exhibiting Purcell Factors >20. Especially the proposed designs for the telecom range prove robust and can sustain expected fiber efficiencies of more than $(82.2\pm4.1)^{+2.2}_{-5.5}$% and expected average Purcell Factors of up to $(23.2\pm2.3)^{+3.2}_{-3.0}$ assuming conservative fabrication accuracies. The wavelength of maximum Purcell enhancement proves to be the most affected performance parameter by the deviations. Finally, we show that electrical field strengths suitable for Stark-tuning of an embedded quantum dot can be reached in the identified designs.

Related papers

• Metropolitan quantum key distribution using a GaN-based room-temperature telecommunication single-photon source [54.32714639668751]
  Single-photon sources (SPS) hold the potential to enhance the performance of quantum key distribution (QKD) We have successfully demonstrated QKD using a room-temperature SPS at telecommunication wavelength.
  arXiv  Detail & Related papers  (2024-09-27T07:35:51Z)
• A Fiber-pigtailed Quantum Dot Device Generating Indistinguishable Photons at GHz Clock-rates [0.507214623687214]
  We present a fiber-pigtailed cavity-enhanced source of flying qubits emitting single indistinguishable photons at clock-rates exceeding 1 GHz. Results show that fiber-pigtailed quantum light sources based on hCBG cavities are a prime candidate for applications of quantum information science.
  arXiv  Detail & Related papers  (2024-09-13T16:55:36Z)
• 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)
• Circular photonic crystal grating design for charge-tunable quantum light sources in the telecom C-band [3.239150403933964]
  Efficient generation of entangled photon pairs at telecom wavelengths is a key ingredient for long-range quantum networks. We propose and analyze hybrid circular photonic crystal gratings, incorporating air holes to facilitate charge carrier transport.
  arXiv  Detail & Related papers  (2024-01-02T22:12:48Z)
• 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)
• Enhancing the Coherence of Superconducting Quantum Bits with Electric Fields [62.997667081978825]
  We show that qubit coherence can be improved by tuning defects away from the qubit resonance using an applied DC-electric field. We also discuss how local gate electrodes can be implemented in superconducting quantum processors to enable simultaneous in-situ coherence optimization of individual qubits.
  arXiv  Detail & Related papers  (2022-08-02T16:18:30Z)
• High performance single-photon sources at telecom wavelength based on broadband hybrid circular Bragg gratings [0.0]
  We develop and study single-photon sources based on InAs/GaAs quantum dots emitting in the telecom O-band. We address the question of scalable by benchmarking the performance of 10 devices covering a wide spectral range of 50 nm within the O-band.
  arXiv  Detail & Related papers  (2022-05-26T09:44:54Z)
• CellDefectNet: A Machine-designed Attention Condenser Network for Electroluminescence-based Photovoltaic Cell Defect Inspection [67.99623869339919]
  A big challenge faced by industry in photovoltaic cell visual inspection is the fact that it is currently done manually by human inspectors. In this work, we introduce CellDefectNet, a highly efficient attention condenser network designed via machine-driven design exploration. We demonstrate the efficacy of CellDefectNet on a benchmark dataset comprising of a diversity of photovoltaic cells captured using electroluminescence imagery.
  arXiv  Detail & Related papers  (2022-04-25T16:35:19Z)
• Design study for an efficient semiconductor quantum light source operating in the telecom C-band based on an electrically-driven circular Bragg grating [0.0]
  We present a detailed design study of circular Bragg gratings etched in InP slabs and operating in the telecom C-band. These devices enable the simultaneous enhancement of the X and XX spectral lines, with collection efficiency in NA=0.65 close to 90% for the wavelength range 1520-1580 nm. We propose a modified device design directly compatible with electrical carrier injection, reporting Purcell factors up to 20 and collection efficiency in NA=0.65 close to 70% for the whole telecom C-band.
  arXiv  Detail & Related papers  (2021-12-24T10:59:56Z)
• 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)

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.