Planar microcavity containing luminescent diamond particles with embedded silicon–vacancy color centers in its active layer

A planar hybrid microcavity containing isolated diamond particles with embedded silicon–vacancy (Si–V) color centers in its active layer is fabricated by plasma-enhanced chemical vapor deposition. Distributed Bragg reflectors are produced on the basis of alternating quarter-wave $a$-Si$_{1-x}$C$_x$ : H and $a$-SiO$_2$ layers. The color centers are controllably introduced from the gas phase during the course of growth of the diamond particles. A narrowing to 5 nm of the zero-phonon line at a wavelength of 738 nm and suppression of the phonon wing in the photoluminescence spectrum of the Si–V color centers are achieved.