Luminescent Characteristics of Needle‐Like Single Crystal Diamonds

Abstract

Luminescent properties of needle-like single crystal diamonds are investigated in a wide range of wavelength. The luminescent spectra with zero phonon lines centered at 389, 442, 468, 534, 563, 575, and 738 nm are detected using excitation by photons and electrons. Obtained photo-and cathodo-luminescent (PL and CL) spectra indicate presence in the singlecrystal diamond needles of nitrogen-and silicon-vacancy centers as well as substitutional or/and interstitials related to these atomic impurities. The dependencies of PL intensities of the 575 and 738 nm lines (related, correspondingly, to nitrogen-and silicon-vacancy centers) on excitation wavelength are determined. Time-resolved measurements are performed for the 575 nm PL line. The luminescence decay behavior for this line demonstrates the presence of recombination processes with characteristic times of about 28 ns (on 200 ns time scale) and 2.8 ns (on 20 ns time scale).

Electron-Induced State Conversion in Diamond NV Centers Measured with Pump–Probe Cathodoluminescence Spectroscopy

“…37,49,50 The CL spectrum, obtained when exciting with a 5 keV pulsed electron beam clearly shows the ZPL of the NV 0 state, with phonon sideband, but no emission from the NVstate is observed, similar to previous work. 25,26,[32][33][34][35][36][37] The relative contribution of NVand NV 0 states to the PL spectrum is obtained by a fitting procedure, with the CL spectrum as a reference for the spectral shape of the NV 0 emission (see Supporting information). Using estimated optical absorption cross sections at the laser excitation wavelength (see Supporting information) we derive the NVand NV 0 fractions: Our pump-probe measurements consist of the independent acquisition of a set of spectra: only CL, only PL, and pump-probe (PP).…”

Formation of GeV, SiV, and NV Color Centers in Single Crystal Diamond Needles Grown by Chemical Vapor Deposition

“…The black line demonstrates spectrum collected near the apex while the spectrum obtained for the area of the needle situated near its base is shown by the red line. The detailed analysis of PL spectra of individual SCDNs obtained in standard CVD process (with use only hydrogen and methane in the gas mixture) was reported previously . Here we analyze only intensive line located at about 738 nm wavelength.…”

“…The detailed analysis of PL spectra of individual SCDNs obtained in standard CVD process (with use only hydrogen and methane in the gas mixture) was reported previously. [16] Here we analyze only intensive line located at about 738 nm wavelength. These position and shape correspond to zero-phonon line (ZPL) of the luminescence of negatively charged SiV color center in diamond.…”

“…SCDN has a pyramidal shape with square base, few nm size of the apex, solid angle from 5 to 10°, and length from 1 to 200 μm . Monocrystalline nature, unique shape, and optical properties of SCDNs make them a budding candidates for optical probes and sensors. The monocrystalline structure of needles as a whole (including those for the areas at apex and at base of the pyramids) has been exhibited in our previous investigations with use of high resolution transmission electron microscopy (see refs.…”

Nanocarbon Photonics and Optoelectronics

“…The productive discussions during the meeting (which has been held on 19–24 March 2017) were provided by perfect organization and nice natural environment, including ski slopes, at Krasnaya Polyana resort (Sochi, Russia). The contributions (in total an amount of 30) of this Special Issue are covering research work related to production, characterization and application of the nanocarbon materials which include diamonds, carbon nanotubes, graphene other types of nanocarbon materials, and their composites . Traditionally for the NPO Workshop series there is also some portion of reports devoted to non‐carbon materials demonstrating properties and phenomena analogous to those observed for nanocarbons.…”