Impurity centers and defects

Luminescence of tungsten complex in diamond particles fabricated by chemical vapor deposition

S. A. Grudinkin^a, K. V. Bogdanov^b, M. A. Baranov^b, A. V. Baranov^b, V. G. Golubev<sup>a

a</sup> Ioffe Institute, Saint-Petersburg, Russia
^b International Research and Educational Center for Physics of Nanostructures, ITMO University, Saint-Petersburg, Russia

Abstract: Diamond nano- and microparticles were synthesized using chemical vapor deposition with a hot tungsten filament on a germanium substrate. The photoluminescence spectra of these particles exhibited intense bands of an optically active complex containing tungsten. The effect of the substrate temperature on the intensity of the luminescence of the tungsten-containing complex and the structural properties of the obtained diamond particles was studied. A gradient of growth parameters along the substrate surface was created by positing the tungsten filament at an angle to the substrate surface. The impact of the simultaneously changing growth parameters of the filament-substrate depending on the distance on the luminescence intensity of the W-complex, the growth rate of diamond particles, and their structural properties and phase composition were demonstrated.

Keywords: diamond, optically active defects, photoluminescence, Raman scattering.

Received: 26.06.2024
Revised: 26.06.2024
Accepted: 27.06.2024

DOI: 10.61011/PSS.2024.08.59061.169