Abstract:
The results of the study of the angular dependence of the photoluminescence of silicon-vacancy color centers in diamond microscopic hemispheres are presented. It is experimentally demonstrated that the use of a glass microsphere with a diameter of 200 microm and a microlens with a numerical aperture of NA = 0.9 in the scheme of recording the photoluminescence signal allows achieving a tenfold increase in the intensity of the photoluminescence signal of the zero-phonon line of the silicon-vacancy color center. Due to the effective collimation of radiation by the microsphere, it became possible to narrow the angular dependence of the color center photoluminescence many times.
Keywords:diamond microparticles, color centers, microsphere, radiation collimation.
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