Superluminescence at nitrogen-vacancy centers in the synthetic diamond pumped by laser radiation in the range of 532−575 nm E. I. Lipatov, D. E. Genin, M. A. Shulepov [et al.]
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ArticleContent type: Текст Media type: электронный Subject(s): фотолюминесценция | алмазы | суперлюминесценция | лазерная генерация | азотно-вакансионные центрыGenre/Form: статьи в журналах Online resources: Click here to access online
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Russian physics journal Vol. 65, № 11. P. 1881-1885Abstract: Photoluminescence spectra of two synthetic diamond samples containing 1−10 ppm nitrogen-vacancy (NV) centers and 100−200 ppm substitutional nitrogen were studied under optical pumping at 532, 560, and 575 nm. At pump intensities less than 0.5−1.0 MW/cm2 , a vibronic photoluminescence band of NV centers in the negative charge state was observed. With an increase in the pump intensity above 0.5−1.0 MW/cm2, a superluminescence band was observed on the long-wavelength shoulder of the phonon wing in the range of 700−760 nm. The superluminescence band intensity increased with the pump intensity. It is shown that the position of the superluminescence band with maxima in the range of 715−720 nm remains unchanged at all optical pump wavelengths.
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Photoluminescence spectra of two synthetic diamond samples containing 1−10 ppm nitrogen-vacancy (NV) centers and 100−200 ppm substitutional nitrogen were studied under optical pumping at 532, 560, and 575 nm. At pump intensities less than 0.5−1.0 MW/cm2 , a vibronic photoluminescence band of NV centers in the negative charge state was observed. With an increase in the pump intensity above 0.5−1.0 MW/cm2, a superluminescence band was observed on the long-wavelength shoulder of the phonon wing in the range of 700−760 nm. The superluminescence band intensity increased with the pump intensity. It is shown that the position of the superluminescence band with maxima in the range of 715−720 nm remains unchanged at all optical pump wavelengths.
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