Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Temperature Dependence of Wavelength Selectable Zero-Phonon Emission
  from Single Defects in Hexagonal Boron Nitride   We investigate the distribution and temperature-dependent optical properties
of sharp, zero-phonon emission from defect-based single photon sources in
multilayer hexagonal boron nitride (h-BN) flakes. We observe sharp emission
lines from optically active defects distributed across an energy range that
exceeds 500 meV. Spectrally-resolved photon-correlation measurements verify
single photon emission, even when multiple emission lines are simultaneously
excited within the same h-BN flake. We also present a detailed study of the
temperature-dependent linewidth, spectral energy shift, and intensity for two
different zero-phonon lines centered at 575 nm and 682 nm, which reveals a
nearly identical temperature dependence despite a large difference in
transition energy. Our temperature-dependent results are best described by a
lattice vibration model that considers piezoelectric coupling to in-plane
phonons. Finally, polarization spectroscopy measurements suggest that whereas
the 575 nm emission line is directly excited by 532 nm excitation, the 682 nm
line is excited indirectly.

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The categories of this paper are: q-fin
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The categories of this paper are: funct-an
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The categories of this paper are: stat
27
The categories of this paper are: comp-gas
3
The categories of this paper are: physics
7
The categories of this paper are: hep-th
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The categories of this paper are: gr-qc
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The categories of this paper are: nucl-th
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The categories of this paper are: atom-ph
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The categories of this paper are: q-bio
2
The categories of this paper are: math
0
The categories of this paper are: hep-ph
28
The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: econ
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The categories of this paper are: adap-org