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- W4383046426 abstract "GaN has recently been shown to host bright, photostable, defect single photon emitters in the 600-700 nm wavelength range that are promising for quantum applications. The nature and origin of these defect emitters remain elusive. In this work, we study the optical dipole structures and orientations of these defect emitters using the defocused imaging technique. In this technique, the far-field radiation pattern of an emitter in the Fourier plane is imaged to obtain information about the structure of the optical dipole moment and its orientation in 3D. Our experimental results, backed by numerical simulations, show that these defect emitters in GaN exhibit a single dipole moment that is oriented almost perpendicular to the wurtzite crystal c-axis. Data collected from many different emitters shows that the angular orientation of the dipole moment in the plane perpendicular to the c-axis exhibits a distribution that shows peaks centered at the angles corresponding to the nearest Ga-N bonds and also at the angles corresponding to the nearest Ga-Ga (or N-N) directions. Moreover, the in-plane angular distribution shows little difference among defect emitters with different emission wavelengths in the 600-700 nm range. Our work sheds light on the nature and origin of these GaN defect emitters." @default.
- W4383046426 created "2023-07-04" @default.
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- W4383046426 date "2023-06-29" @default.
- W4383046426 modified "2023-10-06" @default.
- W4383046426 title "Optical Dipole Structure and Orientation of GaN Defect Single-Photon Emitters" @default.
- W4383046426 doi "https://doi.org/10.48550/arxiv.2306.17339" @default.
- W4383046426 hasPublicationYear "2023" @default.
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