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Sökning: WFRF:(Kianinia Mehran)

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1.
  • Zhigulin, Ivan, et al. (författare)
  • Photophysics of blue quantum emitters in hexagonal boron nitride
  • 2023
  • Ingår i: MATERIALS FOR QUANTUM TECHNOLOGY. - : IOP Publishing Ltd. - 2633-4356. ; 3:1
  • Tidskriftsartikel (refereegranskat)abstract
    • Colour centres in hexagonal boron nitride (hBN) have emerged as intriguing contenders for integrated quantum photonics. In this work, we present a detailed photophysical analysis of hBN single emitters emitting at the blue spectral range. The emitters are fabricated by different electron beam irradiation and annealing conditions and exhibit narrow-band luminescence centred at 436 nm. Photon statistics as well as rigorous photodynamics analysis unveils potential level structure of the emitters, which suggests lack of a metastable state, supported by a theoretical analysis. The potential defect can have an electronic structure with fully occupied defect state in the lower half of the hBN band gap and empty defect state in the upper half of the band gap. Overall, our results are important to understand the photophysical properties of the emerging family of blue quantum emitters in hBN as potential sources for scalable quantum photonic applications.
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2.
  • Zhigulin, Ivan, et al. (författare)
  • Stark Effect of Blue Quantum Emitters in Hexagonal Boron Nitride
  • 2023
  • Ingår i: Physical Review Applied. - : AMER PHYSICAL SOC. - 2331-7019. ; 19:4
  • Tidskriftsartikel (refereegranskat)abstract
    • Inhomogeneous broadening is a major limitation for the application of quantum emitters in hexagonal boron nitride to integrated quantum photonics. Here we demonstrate that so-called blue emitters with an emission wavelength of 436 nm are less sensitive to electric fields than other quantum emitters in hexag-onal boron nitride. Our measurements reveal a weak, predominantly quadratic Stark effect that indicates a negligible transition dipole moment of the defect. Using these results, we discuss implications for the symmetry of the defect and use density-functional-theory simulations to identify a likely atomic structure of blue emitters in hexagonal boron nitride.
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  • Resultat 1-2 av 2
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refereegranskat (2)
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Ivády, Viktor (2)
Aharonovich, Igor (2)
Zhigulin, Ivan (2)
Gale, Angus (2)
Horder, Jake (2)
Lobo, Charlene J. (2)
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Kianinia, Mehran (2)
Toth, Milos (2)
Li, Chi (1)
Yamamura, Karin (1)
White, Simon J. U. (1)
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Linköpings universitet (2)
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Engelska (2)
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2023 (2)

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