Abstract
We study the properties of luminescent diamond particles of different sizes (up to ~1.5 μm) containing multiple NV-centers. We theoretically predict that the average liftetime in such particles is decreased by several times as compared to optically small subwavelength nanodiamonds. In our experiments, samples were obtained by milling the plasma-enhanced chemical vapor deposited diamond film, and characterized by Raman spectroscopy and dark- field spectroscopy methods. Time-resolved luminescence measurements of the excited state of NV-centers showed that their average lifetime varies from 10 to 17 ns in different samples. By comparing this data to the values of the lifetime of the NV-centers in optically small nanodiamonds, known from literature, we confirm a severalfold decrease of the lifetime in resonant particles.
Highlights
Resonant high-refractive-index nanoparticles and nanostructures represent a promising platform for effective light manipulation at nanoscale and pave the way for creation of novel photonic devices
Relatively high refractive index (n ≈ 2.4) of the diamond and almost zero absorption in visible frequency range make it possible to exploit the morphology- and size-dependent resonance properties of the diamond particles to control the emission properties of luminescent centers [3], which is of particular interest for the development of quantum emitters [4, 5]
Experimental results Diamonds particles were made by miling the diamond film fabricated by plasma-enhanced chemical vapor deposition (PECVD) method on a glass substrate [12, 13]
Summary
Resonant high-refractive-index nanoparticles and nanostructures represent a promising platform for effective light manipulation at nanoscale and pave the way for creation of novel photonic devices. We theoretically predict that the average liftetime in such particles is decreased by several times as compared to optically small subwavelength nanodiamonds. Relatively high refractive index (n ≈ 2.4) of the diamond and almost zero absorption in visible frequency range make it possible to exploit the morphology- and size-dependent resonance properties of the diamond particles to control the emission properties of luminescent centers [3], which is of particular interest for the development of quantum emitters [4, 5].
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