Microstructure Engineering of Hexagonal Boron Nitride for Single‐Photon Emitter Applications

Zhang, Chao; Shi, Zhiyuan; Wu, Tianru; Xie, Xiaoming

doi:10.1002/adom.202200207

Cited by 6 publications

(2 citation statements)

References 100 publications

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“…Quantum emitters in solid-state systems have emerged as important components of numerous quantum technology applications, such as quantum communication, , quantum computing, quantum network, and quantum sensing . Over the years, single-photon emitters (SPEs) have been successfully realized in a diverse array of solid-state materials, including point defects in diamond and silicon carbide, − semiconductor quantum dots, , and carbon nanotubes .…”

Section: Introductionmentioning

confidence: 99%

“…Quantum emitters in solid-state systems have emerged as important components of numerous quantum technology applications, such as quantum communication, 1,2 quantum computing, 3 quantum network, 4 and quantum sensing. 5 Over the years, single-photon emitters (SPEs) have been successfully realized in a diverse array of solid-state materials, including point defects in diamond and silicon carbide, 6−9 semiconductor quantum dots, 10,11 and carbon nanotubes. 12 Recently, the boosted two-dimensional (2D) materials have drawn extensive attention due to their proven ability to host SPEs as well as their inherent advantages in device integration and almost ideal out-coupling efficiency.…”

Section: ■ Introductionmentioning

confidence: 99%

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Single-Photon Emission from Point Defects in Hexagonal Boron Nitride Induced by Plasma Treatment

Zeng,

Zhang,

Meng

et al. 2024

ACS Appl. Mater. Interfaces

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Solid-state quantum emitters are gaining significant attention for many quantum information applications. Hexagonal boron nitride (h-BN) is an emerging host material for generating bright, stable, and tunable single-photon emission with narrow line widths at room temperature. In this work, we present a facile and efficient approach to generate high-density single-photon emitters (SPEs) in mechanically exfoliated h-BN through H-or Ar-plasma treatment followed by high-temperature annealing in air. It is notable that the postannealing is essential to suppress the fluorescence background in photoluminescence spectra and enhance emitter stability. These quantum emitters exhibit excellent optical properties, including high purity, brightness, stability, polarization degree, monochromaticity, and saturation intensity. The effects of process parameters on the quality of quantum emitters were systematic investigated. We find that there exists an optimal plasma power and h-BN thickness to achieve a high SPE density. This work offers a practical avenue for generating SPEs in h-BN and holds promise for future research and applications in quantum photonics.

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Section: Introductionmentioning

confidence: 99%

Section: ■ Introductionmentioning

confidence: 99%

Single-Photon Emission from Point Defects in Hexagonal Boron Nitride Induced by Plasma Treatment

Zeng,

Zhang,

Meng

et al. 2024

ACS Appl. Mater. Interfaces

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Plasmon Enhanced Quantum Properties of Single Photon Emitters with Hybrid Hexagonal Boron Nitride Silver Nanocube Systems

Dowran

Butler

Lamichhane

et al. 2023

Advanced Optical Materials

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Hexagonal boron nitride (hBN) has emerged as a promising ultrathin host of single photon emitters (SPEs) with favorable quantum properties at room temperature, making it a highly desirable element for integrated quantum photonic networks. One major challenge of using these SPEs in such applications is their low quantum efficiency. Recent studies have reported an improvement in quantum efficiency by up to two orders of magnitude when integrating an ensemble of emitters such as boron vacancy defects in multilayered hBN flakes embedded within metallic nanocavities. However, these experiments have not been extended to SPEs and are mainly focused on multiphoton effects. Here, the quantum single‐photon properties of hybrid nanophotonic structures composed of SPEs created in ultrathin hBN flakes coupled with plasmonic silver nanocubes (SNCs) are studied. The authors demonstrate 200% plasmonic enhancement of the SPE properties, manifested by a strong increase in the SPE fluorescence. Such enhancement is explained by rigorous numerical simulations where the hBN flake is in direct contact with the SNCs that cause the plasmonic effects. The presented strong and fast single photon emission obtained at room temperature with a compact hybrid nanophotonic platform can be very useful to various emerging applications in quantum optical communications and computing.

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3D Nanoarchitectured Hexagonal Boron Nitride with Integrated Single Photon Emitters

Aleman,

Lyu,

Noyan

et al. 2023

Advanced Optical Materials

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Two‐dimensional (2D) hexagonal boron nitride (hBN) is one of the most promising candidates to host solid‐state single photon emitters (SPEs) for various quantum technologies. However, the 2D nature with an atomic‐scale thickness leads to inevitable challenges in spectral variability caused by substrate disturbance, lattice strain heterogeneity, and defect variation. Here, three‐dimensional (3D) nanoarchitectured hBN is reported with integrated SPEs from native defects generated during high‐temperature chemical vapor deposition (CVD). The 3D hBN has a quasi‐periodic gyroid minimal surface structure and is composed of a continuous 2D hBN sheet with built‐in convex and concave curvatures that promote the formation of optically active and thermally robust native defects. The free‐standing feature of the gyroid hBN with a nearly zero mean curvature can effectively eliminate the substrate disturbance and minimize lattice strain heterogeneity. As a result, naturally occurring defects with a narrow SPE spectral distribution can be created and activated as color centers in the 3D hBN, and the density of the SPEs can be tailored by CVD temperature.

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Microstructure Engineering of Hexagonal Boron Nitride for Single‐Photon Emitter Applications

Cited by 6 publications

References 100 publications

Single-Photon Emission from Point Defects in Hexagonal Boron Nitride Induced by Plasma Treatment

Single-Photon Emission from Point Defects in Hexagonal Boron Nitride Induced by Plasma Treatment

Plasmon Enhanced Quantum Properties of Single Photon Emitters with Hybrid Hexagonal Boron Nitride Silver Nanocube Systems

3D Nanoarchitectured Hexagonal Boron Nitride with Integrated Single Photon Emitters

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