Impurity centers

Dependence of the characteristics of spectrally narrow luminescence lines in nanodiamonds on the excitation and temperature parameters

S. A. Grudinkin, A. N. Smirnov, V. Yu. Davydov, V. G. Golubev

Ioffe Institute, St. Petersburg, Russia

Abstract: The influence of the excitation parameters and temperature on the spectral characteristics of narrow photoluminescence lines in nanodiamonds obtained by chemical vapor deposition is investigated. It is shown that the ratio of the line intensities in the spectrum depends on the wavelength and power of the excitation radiation. For some lines, with increasing power, a shift in the position of their maximum and broadening is also observed. After irradiation of nanodiamonds with a laser beam with a power density of $\sim$ 1.2$\times$10$^5$ W/cm$^2$, the relative line intensities change. With increasing temperature in the range 79 – 300 K, temperature quenching of their intensity is observed.

Keywords: diamond, color centers, photoluminescence, chemical vapor deposition.

Received: 14.04.2021
Revised: 18.04.2021
Accepted: 18.04.2021

DOI: 10.21883/FTT.2021.08.51166.086

 English version: Physics of the Solid State, 2021, 63:8, 1170–1175

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