Details
| Original language | English |
|---|---|
| Pages (from-to) | 2056-2063 |
| Number of pages | 8 |
| Journal | ACS PHOTONICS |
| Volume | 7 |
| Issue number | 8 |
| Early online date | 15 Jul 2020 |
| Publication status | Published - 19 Aug 2020 |
Abstract
Dipole orientation in solid-state single photon emitters plays an important role in applications such as quantum information devices integrated with nanophotonic components. In various single photon emitters, hexagonal boron nitride (hBN) with point defects is one of the most promising candidates as a single photon emitter for high photostability, ultrahigh brightness, nonlinearity, and narrow emission line width. In applying hBN with a single point defect to those applications, three-dimensional determination of its dipole orientation is critically important. In this paper, we three-dimensionally determine the dipole orientation of single defects in hBN nanoflakes. By measuring the second-order correlation function and emission spectra, hBN nanoflakes with single defects were found from hBN nanoflakes placed on microscope coverslips. High-resolution emission intensity patterns were measured by exciting the defects in the hBNs with a focused radially polarized beam and azimuthally polarized beam. By comparing these patterns with theoretical calculations, we determined the polar angle and azimuthal angle of the dipole moment and found that they were oriented near the plane of the layers of the hBN nanoflakes on the microscope coverslip on which they were placed. This information is important to realize highly efficient quantum information devices in which the dipole orientation has to be precisely controlled.
Keywords
- 2D materials, confocal microscope, dipole orientation, hexagonal boron nitride, single-photon emitters, vector beam
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Biochemistry, Genetics and Molecular Biology(all)
- Biotechnology
- Physics and Astronomy(all)
- Atomic and Molecular Physics, and Optics
- Engineering(all)
- Electrical and Electronic Engineering
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In: ACS PHOTONICS, Vol. 7, No. 8, 19.08.2020, p. 2056-2063.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Determination of the Dipole Orientation of Single Defects in Hexagonal Boron Nitride
AU - Takashima, Hideaki
AU - Maruya, Hironaga
AU - Ishihara, Keita
AU - Tashima, Toshiyuki
AU - Shimazaki, Konosuke
AU - Schell, Andreas W.
AU - Tran, Toan Trong
AU - Aharonovich, Igor
AU - Takeuchi, Shigeki
N1 - Funding information: We would like to thank to Mr. Kazuki Fukushige and Hiroki Kawaguchi for the analysis of the second-order correlation function g (?) and Prof. Jun-ichi Hotta for the discussion of the dipole orientation of single photon emitters. We gratefully acknowledge financial support in the form of Kakenhi Grants-in-Aid (Nos. 26220712, 16K04918, 19K03700, and 19K03686) from the Japan Society for the Promotion of Science (JSPS), the CREST program of the Japan Science and Technology Agency (JST) (JPMJCR1674), and the MEXT Quantum Leap Flagship Program (MEXT Q-LEAP) (JPMXS0118067634). H.T. acknowledges the support of the Matsuo Foundation. I.A. acknowledges financial support from the Australian Research Council (DP180100077). 2
PY - 2020/8/19
Y1 - 2020/8/19
N2 - Dipole orientation in solid-state single photon emitters plays an important role in applications such as quantum information devices integrated with nanophotonic components. In various single photon emitters, hexagonal boron nitride (hBN) with point defects is one of the most promising candidates as a single photon emitter for high photostability, ultrahigh brightness, nonlinearity, and narrow emission line width. In applying hBN with a single point defect to those applications, three-dimensional determination of its dipole orientation is critically important. In this paper, we three-dimensionally determine the dipole orientation of single defects in hBN nanoflakes. By measuring the second-order correlation function and emission spectra, hBN nanoflakes with single defects were found from hBN nanoflakes placed on microscope coverslips. High-resolution emission intensity patterns were measured by exciting the defects in the hBNs with a focused radially polarized beam and azimuthally polarized beam. By comparing these patterns with theoretical calculations, we determined the polar angle and azimuthal angle of the dipole moment and found that they were oriented near the plane of the layers of the hBN nanoflakes on the microscope coverslip on which they were placed. This information is important to realize highly efficient quantum information devices in which the dipole orientation has to be precisely controlled.
AB - Dipole orientation in solid-state single photon emitters plays an important role in applications such as quantum information devices integrated with nanophotonic components. In various single photon emitters, hexagonal boron nitride (hBN) with point defects is one of the most promising candidates as a single photon emitter for high photostability, ultrahigh brightness, nonlinearity, and narrow emission line width. In applying hBN with a single point defect to those applications, three-dimensional determination of its dipole orientation is critically important. In this paper, we three-dimensionally determine the dipole orientation of single defects in hBN nanoflakes. By measuring the second-order correlation function and emission spectra, hBN nanoflakes with single defects were found from hBN nanoflakes placed on microscope coverslips. High-resolution emission intensity patterns were measured by exciting the defects in the hBNs with a focused radially polarized beam and azimuthally polarized beam. By comparing these patterns with theoretical calculations, we determined the polar angle and azimuthal angle of the dipole moment and found that they were oriented near the plane of the layers of the hBN nanoflakes on the microscope coverslip on which they were placed. This information is important to realize highly efficient quantum information devices in which the dipole orientation has to be precisely controlled.
KW - 2D materials
KW - confocal microscope
KW - dipole orientation
KW - hexagonal boron nitride
KW - single-photon emitters
KW - vector beam
UR - http://www.scopus.com/inward/record.url?scp=85088871275&partnerID=8YFLogxK
U2 - 10.1021/acsphotonics.0c00405
DO - 10.1021/acsphotonics.0c00405
M3 - Article
AN - SCOPUS:85088871275
VL - 7
SP - 2056
EP - 2063
JO - ACS PHOTONICS
JF - ACS PHOTONICS
SN - 2330-4022
IS - 8
ER -