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Scientific-technical journal

PHOTOLUMINESCENCE AND RAMAN SPECTRA OF DIAMOND MICROPOWDERS PLACED IN PHOTON TRAPS

И. А. Рахматуллаев, В. С. Горелик, Ramizulla A. Muminov, Oybek Tursunkulov, Tukfatullin Oskar Faritovich, М. Р. Рахматуллаев, A.K. Kurbonov

Published Jan 1, 2020• 0 citations
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Abstract The diamond nitrogen-vacancy center with a negative charge (NV−) exhibits exceptional optical properties and enables highly sensitive detection of multiple physical quantities. The development of a simple and efficient method for fabricating NV− centers in diamonds holds significant importance in promoting their widespread application. The fabrication method of NV− centers is explored in this work, utilizing high-energy photons emitted by argon ions to induce vacancies in type Ia diamond substrates. The processed samples are optical characterized, and the characteristic peak and zero phonon line corresponding to the NV− center can be observed in Raman and photoluminescence spectra respectively. The concentration of NV− centers in samples could reach up to 153.9 ppb, estimated by integrating the fluorescence intensity of the photoemission spectrum. The samples exhibit the spin characterization of NV− centers, which achieve a maximum contrast of 1.5% in the optical detection magnetic resonance (ODMR) spectra.

Journal of Physics Conference Series•May 1, 2024•0 citations
In our work we investigated different optical characteristics of five diamond samples that were supposed to be pure. The characteristics were the following: optical absorption spectra in the range 200 nm – 15μm, Raman scattering spectra in the range 100-3700 cm-1 and photoluminescence spectra in the range 200 – 850 nm. The temperature of diamond samples was varied from 80 to 300 K. Photoluminescence was excited by KrCl*-laser radiation (λ=222 nm) with pulsewidth of 8 ns (FWHM) and peak intensity of 13 MW/cm2. We found out that the band of radiative recombination of the electron-hole liquid (with the maximum at 240 nm) can be observed in the photoluminescence spectra if the absorption coefficient of the diamond sample is less than 10 cm-1 in the range 225-226 nm.
Optical absorption spectra in the spectral range from 200 nm to 15 μm, Raman spectra in the wavenumber range of 100–3700 cm –1 , and photoluminescence spectra in the spectral range of 200–850 nm have been studied for five nominally “pure” diamond samples synthesized in different ways. The measurements have been carried out in the temperature range of 80–300 K. Photoluminescence was excited by the KrCl laser radiation at a wavelength of 222 nm with a pulse FWHM of 8 ns and a peak intensity on the sample surface of up to 13 MW/cm 2 . It is found that, at absorption coefficients of diamond samples below 10 cm –1 in the spectral range of 225–226 nm, their photoluminescence spectra exhibit a radiative recombination band of electron–hole liquid peaked at 240 nm.
Abstract The diamond nitrogen-vacancy center with a negative charge (NV−) exhibits exceptional optical properties and enables highly sensitive detection of multiple physical quantities. The development of a simple and efficient method for fabricating NV− centers in diamonds holds significant importance in promoting their widespread application. The fabrication method of NV− centers is explored in this work, utilizing high-energy photons emitted by argon ions to induce vacancies in type Ia diamond substrates. The processed samples are optical characterized, and the characteristic peak and zero phonon line corresponding to the NV− center can be observed in Raman and photoluminescence spectra respectively. The concentration of NV− centers in samples could reach up to 153.9 ppb, estimated by integrating the fluorescence intensity of the photoemission spectrum. The samples exhibit the spin characterization of NV− centers, which achieve a maximum contrast of 1.5% in the optical detection magnetic resonance (ODMR) spectra.