Relationship between grain boundaries and broad luminescence peaks in CVD diamond films

Mora, A. E.; Steeds, John W; Butler, James E.

doi:10.1016/s0925-9635(02)00324-2

Cited by 17 publications

(5 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For other emitters, broadband background emission of the diamond material deteriorates the g (2) functions. For the spectral region of interest, the broad luminescence is attributed to sp 2 bonded disordered carbon (in diamond films) introducing electronic states into the bandgap (e.g., [11]) or to grain boundaries in the diamond material [12]. To take into account background luminescence, we follow Ref.…”

Section: Intensity Auto-correlation (Gmentioning

confidence: 99%

Photophysics of single silicon vacancy centers in diamond: implications for single photon emission

Agio²,

2012

View full text Add to dashboard Cite

Single silicon vacancy (SiV) color centers in diamond have recently shown the ability for high brightness, narrow bandwidth, room temperature single photon emission. This work develops a model describing the three level population dynamics of single SiV centers in diamond nanocrystals on iridium surfaces including an intensity dependent de-shelving process. Furthermore, we investigate the brightness and photostability of single centers and find maximum single photon rates of 6.2 Mcps under continuous excitation. We investigate the collection efficiency of the fluorescence and estimate quantum efficiencies of the SiV centers.

show abstract

Section: Intensity Auto-correlation (Gmentioning

confidence: 99%

Photophysics of single silicon vacancy centers in diamond: implications for single photon emission

Agio²,

2012

View full text Add to dashboard Cite

show abstract

“…The band at 700 nm is very likely identical to a band which is observed in the range 700-730 nm in many deformed and impact diamonds (Plotnikova et al 1980;Galimov et al 1980) as well as in ultra-pure synthetic nanocrystalline diamonds (Ikeda and Sumiya 2016). Initial assignment of this band to dislocationrelated defects (Plotnikova et al, 1980) found some support in Mora et al (2002Mora et al ( , 2003. In a recent detailed investigation of PL spectra of deformed N-containing terrestrial diamonds (Hainschwang et al, 2020) it was suggested that the "700" nm band is a vibronic mode of a ZPL located at 620 nm, which, in turn, is clearly pronounced only at low temperatures.…”

Section: Photoluminescence Spectroscopymentioning

confidence: 65%

Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Shiryaev

Pavlushin

Pakhnevich

et al. 2022

Meteorit & Planetary Scien

View full text Add to dashboard Cite

An unusual variety of impact-related diamond from the Popigai impact structure -yakutites-is characterized by complementary methods including optical microscopy, X-ray diffraction, radiography and tomography, infrared, Raman, and luminescence spectroscopy providing structural information at widely different scales. It is shown that relatively large graphite aggregates may be transformed to diamond with preservation of many morphological features. Spectroscopic and X-ray diffraction data indicate that the yakutite matrix represents bulk nanocrystalline diamond. For the first time, features of twophonon IR absorption spectra of bulk nanocrystalline diamond are interpreted in the framework of phonon dispersion curves. Luminescence spectra of yakutite are dominated by dislocation-related defects. Optical microscopy supported by X-ray diffraction reveals the presence of single crystal diamonds with sizes of up to several tens of microns embedded into nanodiamond matrix. The presence of single crystal grains in impact diamond may be explained by chemical vapor deposition-like growth in a transient cavity and/or a secondslong compression stage of the impact process due to slow pressure release in a volatile-rich target. For the first time, protogenetic mineral inclusions in yakutites represented by mixed monoclinic and tetragonal ZrO 2 are observed. This implies the presence of baddeleyite in target rocks responsible for yakutite formation.

show abstract

“…As a result, nanosized twins are found to exist parallel to {111} or, alternatively, a highly stressed structure is formed by two different types of extended defects located on either side of the plane boundary. 18) These results suggest the possible presence of dense twin structures producing the PL peak at ∼730 nm. However, in general, this peak appears along with the GR1 center.…”

mentioning

confidence: 86%

“…Chemically and isotopically pure NPD specimens of 3 mm diameter and 1 mm thickness were synthesized by direct conversion from high-purity graphite at pressures of [15][16][17][18] GPa and a temperature of ∼2300 °C for 20 min. The surfaces of both sides of the obtained NPD specimens were finely polished to a mirror finish using a high-speed polishing machine with a metal-bonded diamond wheel.…”

mentioning

confidence: 99%

Optical properties of ultrapure nano-polycrystalline diamond

Ikeda

Sumiya

2016

Jpn. J. Appl. Phys.

View full text Add to dashboard Cite

We synthesized an ultrapure nano-polycrystalline diamond (NPD) containing very few chemical impurities (<1 ppm). The 13C concentration of the carbon source was reduced to less than 0.01% by using 12C-enriched high-purity carbon. The ultrapure NPD was synthesized by direct conversion from graphite under high-pressure and high-temperature (HPHT) conditions. We measured the optical properties of the ultrapure NPD, which appeared yellowish, attributed to the structural features of the specimen. Also, the one-phonon absorption peak at 1220 cm−1 is attributed to the broken symmetry of the diamond lattice. Moreover, a defect-related PL peak was found at 730 nm.

show abstract

Relationship between grain boundaries and broad luminescence peaks in CVD diamond films

Cited by 17 publications

References 5 publications

Photophysics of single silicon vacancy centers in diamond: implications for single photon emission

Photophysics of single silicon vacancy centers in diamond: implications for single photon emission

Structural peculiarities, mineral inclusions, and point defects in yakutites—A variety of impact‐related diamond

Optical properties of ultrapure nano-polycrystalline diamond

Contact Info

Product

Resources

About