%0 Journal Article
%T Efficient single photon emission from a high-purity hexagonal boron nitride crystal
%+ Laboratoire Charles Coulomb (L2C)
%+ Pontificia Universidad Católica de Chile (UC)
%A Martinez, L. J.
%A Pelini, Thomas
%A Waselowski, V.
%A Maze, J. R.
%A Gil, Bernard
%A Cassabois, Guillaume
%A Jacques, Vincent
%< avec comité de lecture
%Z L2C:16-153
%@ 2469-9950
%J Physical Review B
%I American Physical Society
%V 94
%N 12
%P 121405
%8 2016
%D 2016
%R 10.1103/PhysRevB.94.121405
%Z Physics [physics]/Condensed Matter [cond-mat]/Materials Science [cond-mat.mtrl-sci]Journal articles
%X Among a variety of layered materials used as building blocks in van der Waals heterostructures, hexagonal boron nitride (hBN) appears as an ideal platform for hosting optically-active defects owing to its large bandgap ($\sim 6$~eV). Here we study the optical response of a high-purity hBN crystal under green laser illumination. By means of photon correlation measurements, we identify individual defects emitting a highly photostable fluorescence under ambient conditions. A detailed analysis of the photophysical properties reveals a high quantum efficiency of the radiative transition, leading to a single photon source with very high brightness ($\sim 4\times 10^6$ counts.s$^{-1}$). These results illustrate how the wide range of applications offered by hBN could be further extended to photonic-based quantum information science and metrology.
%G English
%2 https://hal.science/hal-01383967/document
%2 https://hal.science/hal-01383967/file/PDF6.pdf
%L hal-01383967
%U https://hal.science/hal-01383967
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ ANR
%~ UM-2015-2021