scholarly journals Observation of near-infrared sub-Poissonian photon emission in hexagonal boron nitride at room temperature

APL Photonics ◽  
2020 ◽  
Vol 5 (7) ◽  
pp. 076103
Author(s):  
Robin Camphausen ◽  
Loris Marini ◽  
Sherif Abdulkader Tawfik ◽  
Toan Trong Tran ◽  
Michael J. Ford ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Room Temperature ◽  
Near Infrared ◽  
Hexagonal Boron Nitride ◽  
Photon Emission

scholarly journals Mechanical decoupling of quantum emitters in hexagonal boron nitride from low-energy phonon modes

2020 ◽  
Vol 6 (40) ◽  
pp. eaba6038 ◽  
Author(s):  
Michael Hoese ◽  
Prithvi Reddy ◽  
Andreas Dietrich ◽  
Michael K. Koch ◽  
Konstantin G. Fehler ◽  
...  
Keyword(s):  
Fourier Transform ◽  
Boron Nitride ◽  
Room Temperature ◽  
Hexagonal Boron Nitride ◽  
Photon Emission ◽  
Phonon Modes ◽  
Out Of Plane ◽  
The Fourier Transform ◽  
Mechanical Decoupling ◽  
Quantum Emitters

Quantum emitters in hexagonal boron nitride were recently reported to hold unusual narrow homogeneous linewidths of tens of megahertz within the Fourier transform limit at room temperature. This unique observation was traced back to decoupling from in-plane phonon modes. Here, we investigate the origins for the mechanical decoupling. New sample preparation improved spectral diffusion, which allowed us to reveal a gap in the electron-phonon spectral density for low phonon frequencies. This sign for mechanical decoupling persists up to room temperature and explains the observed narrow lines at 300 kelvin. We investigate the dipole emission directionality and reveal preferred photon emission through channels between the layers supporting the claim for out-of-plane distorted defect centers. Our work provides insights into the underlying physics for the persistence of Fourier transform limit lines up to room temperature and gives a guide to the community on how to identify the exotic emitters.

scholarly journals Tunable and high-purity room temperature single-photon emission from atomic defects in hexagonal boron nitride

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Gabriele Grosso ◽  
Hyowon Moon ◽  
Benjamin Lienhard ◽  
Sajid Ali ◽  
Dmitri K. Efetov ◽  
...  
Keyword(s):  
Boron Nitride ◽  
High Purity ◽  
Room Temperature ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Photon Emission ◽  
Single Photon Emission

scholarly journals Creation of Negatively Charged Boron Vacancies in Hexagonal Boron Nitride Crystal by Electron Irradiation and Mechanism of Inhomogeneous Broadening of Boron Vacancy-Related Spin Resonance Lines

Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1373
Author(s):  
Fadis F. Murzakhanov ◽  
Boris V. Yavkin ◽  
Georgiy V. Mamin ◽  
Sergei B. Orlinskii ◽  
Ivan E. Mumdzhi ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Electron Irradiation ◽  
Near Infrared ◽  
Hexagonal Boron Nitride ◽  
Optical Excitation ◽  
High Energy ◽  
Infrared Range ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Spin Resonance

Optically addressable high-spin states (S ≥ 1) of defects in semiconductors are the basis for the development of solid-state quantum technologies. Recently, one such defect has been found in hexagonal boron nitride (hBN) and identified as a negatively charged boron vacancy (VB−). To explore and utilize the properties of this defect, one needs to design a robust way for its creation in an hBN crystal. We investigate the possibility of creating VB− centers in an hBN single crystal by means of irradiation with a high-energy (E = 2 MeV) electron flux. Optical excitation of the irradiated sample induces fluorescence in the near-infrared range together with the electron spin resonance (ESR) spectrum of the triplet centers with a zero-field splitting value of D = 3.6 GHz, manifesting an optically induced population inversion of the ground state spin sublevels. These observations are the signatures of the VB− centers and demonstrate that electron irradiation can be reliably used to create these centers in hBN. Exploration of the VB− spin resonance line shape allowed us to establish the source of the line broadening, which occurs due to the slight deviation in orientation of the two-dimensional B-N atomic plains being exactly parallel relative to each other. The results of the analysis of the broadening mechanism can be used for the crystalline quality control of the 2D materials, using the VB− spin embedded in the hBN as a probe.

Room temperature spin valve effect in the NiFe/Gr–hBN/Co magnetic tunnel junction

2016 ◽  
Vol 4 (37) ◽  
pp. 8711-8715 ◽  
Author(s):  
Muhammad Zahir Iqbal ◽  
Salma Siddique ◽  
Ghulam Hussain ◽  
Muhammad Waqas Iqbal
Keyword(s):  
Boron Nitride ◽  
Tunnel Junction ◽  
Room Temperature ◽  
Hexagonal Boron Nitride ◽  
Spin Valve ◽  
Magnetic Tunnel Junction ◽  
Valve Effect ◽  
First Time

Graphene and hexagonal boron nitride (hBN) have shown fascinating features in spintronics due to their metallic and tunneling behaviors, respectively. In this work, we report for the first time room temperature spin valve effect in NiFe/Gr–hBN/Co configuration.

Tribological and Corrosion Behavior of HVOF Sprayed Cr3C2-NiCr with Nickel Cladded Graphite and Hexagonal Boron Nitride

2021 ◽  
Author(s):  
M. Oechsner ◽  
T. Engler ◽  
H. Scheerer ◽  
Y. Joung ◽  
K. Bobzin ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Friction And Wear ◽  
Room Temperature ◽  
Solid Lubricant ◽  
Hexagonal Boron Nitride ◽  
Solid Lubricants ◽  
Wear Behaviour ◽  
Wear Volume ◽  
Coating Microstructure ◽  
Sprayed Coatings

Abstract High-velocity oxyfuel (HVOF) sprayed coatings of Cr3C2-NiCr containing solid lubricants such as nickel cladded graphite and hexagonal boron nitride were successfully developed and characterised with the aim of optimizing their friction and wear behaviour. HVOF technology was used for the integration of solid lubricants to achieve strong cohesion between particles while minimizing thermal decomposition. Coating microstructure and composition were measured and correlated to the results of tribological and corrosion tests. The integration of the solid lubricant greatly reduced friction and wear volume at room temperature, but the lubricating effect was highly dependent on atmosphere and temperature. Cr3C2-NiCr with hBN, however, tends to exhibit more stable wear resistance over a wider temperature range and can be used at temperatures beyond 450 °C.

Single-photon emission from two-dimensional hexagonal boron nitride annealed in a carbon-rich environment

2020 ◽  
Vol 117 (24) ◽  
pp. 244002
Author(s):  
Chao Lyu ◽  
Yaozheng Zhu ◽  
Pingfan Gu ◽  
Jiandong Qiao ◽  
Kenji Watanabe ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Photon Emission ◽  
Two Dimensional ◽  
Single Photon Emission

scholarly journals Integration of Single-Photon Emitters in 2D Materials with Plasmonic Waveguides at Room Temperature

Nanomaterials ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1663
Author(s):  
Kwang-Yong Jeong ◽  
Seong Won Lee ◽  
Jae-Hyuck Choi ◽  
Jae-Pil So ◽  
Hong-Gyu Park
Keyword(s):  
Integrated Circuits ◽  
Room Temperature ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Photon Emission ◽  
Plasmonic Waveguide ◽  
Practical Implementation ◽  
Plasmonic Waveguides ◽  
Time Resolved ◽  
Ag Nanowire

Efficient integration of a single-photon emitter with an optical waveguide is essential for quantum integrated circuits. In this study, we integrated a single-photon emitter in a hexagonal boron nitride (h-BN) flake with a Ag plasmonic waveguide and measured its optical properties at room temperature. First, we performed numerical simulations to calculate the efficiency of light coupling from the emitter to the Ag plasmonic waveguide, depending on the position and polarization of the emitter. In the experiment, we placed a Ag nanowire, which acted as the plasmonic waveguide, near the defect of the h-BN, which acted as the single-photon emitter. The position and direction of the nanowire were precisely controlled using a stamping method. Our time-resolved photoluminescence measurement showed that the single-photon emission from the h-BN flake was enhanced to almost twice the intensity as a result of the coupling with the Ag nanowire. We expect these results to pave the way for the practical implementation of on-chip nanoscale quantum plasmonic integrated circuits.

scholarly journals Identifying carbon as the source of visible single-photon emission from hexagonal boron nitride

2020 ◽  
Author(s):  
Noah Mendelson ◽  
Dipankar Chugh ◽  
Jeffrey R. Reimers ◽  
Tin S. Cheng ◽  
Andreas Gottscholl ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Single Photon ◽  
Hexagonal Boron Nitride ◽  
Photon Emission ◽  
Single Photon Emission

Formation of quantum emitter arrays in hexagonal Boron Nitride at room temperature

2018 ◽  
Author(s):  
Nicholas V Proscia ◽  
Zav Shoton ◽  
Harishankar Jayakumar ◽  
Prithvi Reddy ◽  
Michael Dollar ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Room Temperature ◽  
Hexagonal Boron Nitride ◽  
Quantum Emitter

Room-temperature quantum emitter arrays in hexagonal boron nitride

2017 ◽  
Author(s):  
Nicholas V Proscia ◽  
Zav Shoton ◽  
Harishankar Jayakumar ◽  
Prithvi Reddy ◽  
Marcus Doherty ◽  
...  
Keyword(s):  
Boron Nitride ◽  
Room Temperature ◽  
Hexagonal Boron Nitride ◽  
Quantum Emitter
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