Optical characterization of diamond

Bachmann, Peter K.; Wiechert, Detlef

doi:10.1016/0925-9635(92)90141-a

Cited by 116 publications

(33 citation statements)

References 30 publications

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“…18 The presence of boron impurities breaks the translational symmetry of the diamond lattice, allowing the scattering from vibrational modes outside the center of the Brillouin zone. 19 The observed bands, therefore, might be connected with the maxima of the VDOS of diamond.…”

Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

“…This may be due to the incorporation of nitrogen atoms. 19 Nitrogen inclusion is commonly observed in CVD diamond, due to even small impurity content 20 in the feeding gases or to micro-leakages in the growth reactor. Nitrogen gives rise to a great number of photoluminescent defect centers.…”

Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

“…4,19,23 Bergman et al 23 have found a clear correlation between the PL band and the presence of graphitic carbon in the CVD films, as evidenced by their Raman spectra. On the basis of this correlation, these authors suggested that the PL broad band emission could be attributed to a continuous distribution of in-gap states introduced by sp 2 carbon phase in the films.…”

Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

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Raman and photoluminescence study of hot filament CVD diamond films grown on WC–Co substrates

Donato

Faggio

Messina

et al. 2008

J Raman Spectroscopy

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In this work, a Raman and photoluminescence (PL) study of synthetic diamond films grown by hot filament chemical vapor deposition (CVD) on WC-Co is presented. The changes in the Raman spectrum induced by the different pretreatments of the substrate and/or different growth parameters of the films are discussed. In particular, the spectra of the films grown at 740°C substrate temperature, 36 mbar pressure and 1.7% methane content in the CH 4 -H 2 gas mixture and after different substrate pretreatments show all the features commonly observed in nanocrystalline diamond films, overlapped with a large PL background. A significant level of compressive stress is qualitatively deduced by the shift of the diamond Raman peaks. The different pretreatments of the substrates seem to have no influence on the quality of the diamond films. On the contrary, in samples grown at 700°C substrate temperature, 10 mbar pressure and 1% methane content in the CH 4 -H 2 gas mixture, the contribution of the non-diamond carbon phases to the Raman spectrum substantially decreases, even though the diamond Raman peak remains shifted and broad. Impurities in the films have been identified by means of low-temperature PL measurements. Wand Si-related optical centers have been clearly observed, together with a band at approximately 1.967 eV probably connected to a nitrogen-related defect center.

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Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

Section: Raman and Photoluminescence Characterizationmentioning

confidence: 99%

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Raman and photoluminescence study of hot filament CVD diamond films grown on WC–Co substrates

Donato

Faggio

Messina

et al. 2008

J Raman Spectroscopy

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“…Also influences of process parameters, like the CH 4 concentration, on the diamond "quality" can be studied using CL as shown in [62]. However, the information obtained using IR, CL or PL about the incorporation of impurities of doping elements are difficult to quantify [46,58]. Therefore, other methods, like elastic recoil detection analysis (ERDA), Rutherford backscattering spectrometry (RBS), nuclear reaction analysis (NRA), secondary ion mass spectrometry (SIMS) and neutron activation analysis (NAA) are used for the quantitative analysis of a impurities and dopants.…”

Section: Diamond Bulk Materials Characterizationmentioning

confidence: 99%

Superhard coatings ? Production and analysis

et al. 1997

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Abstract. In the development of diamond and c-BN products the analytical methods for characterizing the surface, bulk and interface of the diamond coatings are very important. SEM, Raman, XRD and IR are the methods used for characterization and SIMS, TEM, AES, NRA, RBS, XPS, STM, etc. are used for the investigation of special problems. The techniques for diamond and c-BN production are briefly summarized to give an idea of the complex interactions between production, application and analytical characterization. The analytical methods for diamond characterization and many relevant results are summarized in this paper; some physical properties (e.g. thermal conductivity, transparency, etc.) and their interaction with applications are also discussed.

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“…However, the particles also contain about 30 cm Ϫ1 broad peaks at 1450 cm Ϫ1 and at 1100 cm Ϫ1 , which can be attributed to nanocrystalline diamond. 18 Possibly, the laserproduced particle precursors are diamond-like, but they are coated by a graphite layer during plasma operation.…”

Section: F Deposition Of the Network On The Surfacementioning

confidence: 99%

Laser-induced particle formation and coalescence in a methane discharge

Stoffels¹,

Stoffels²,

Ceccone³

et al. 1999

Journal of Vacuum Science &Amp; Technology A: Vacuum, Surfaces, and Films

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Laser-induced formation of submicrometer dust particles and the subsequent coalescence phenomena in a low-pressure methane radio-frequency plasma have been analyzed. Six distinct phases can be distinguished: ͑a͒ nanoparticle synthesis by laser interaction with the plasma species, ͑b͒ particle conglomeration and the formation of ordered Coulomb lattices at the plasma-sheath region above the powered electrode, ͑c͒ coalescence of grains within the Coulomb lattice and formation of submillimeter strings, ͑d͒ condensation of the strings in the discharge and the formation of V-shaped structures, ͑e͒ condensation of the V structures into a single network of several centimeters in diameter suspended in the plasma, ͑f͒ deposition of the network on the electrode and its subsequent growth on the surface. Large carbon structures as well as nanoparticles have been analyzed in situ by He-Ne laser light scattering and laser ablation and ex situ by an optical and a scanning electron microscope, and by micro-Raman spectroscopy.

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Optical characterization of diamond

Cited by 116 publications

References 30 publications

Raman and photoluminescence study of hot filament CVD diamond films grown on WC–Co substrates

Raman and photoluminescence study of hot filament CVD diamond films grown on WC–Co substrates

Superhard coatings ? Production and analysis

Laser-induced particle formation and coalescence in a methane discharge

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