Optical absorption and luminescence in diamond
نویسندگان
چکیده
منابع مشابه
Correlating optical absorption and thermal conductivity in diamond
The presence of defects in diamond induces one-phonon infrared absorption which is not allowed in the perfect crystal due to symmetry. Concomitantly the thermal conductivity is reduced by additional phonon-defect scattering. For single crystal diamonds irradiated with fast neutrons, we find a correlation between the one-phonon absorption and the room-temperature thermal conductivity valid over ...
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Optical absorption by the neutral vacancy in diamond has been predicted to occur between the ground ‘E state and the IT, excited state. Both these states are orbitally degenerate and should show Jahn Teller distortions. We have calculated the Huang-Rhys Factor for the transition (the fraction of the intensity in the zero phonon line) and the first and second moments of the absorption band. Also...
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We used ion beam induced luminescence (IBIL) to study the evolution of damage during ion implantation of natural type-IIa diamond with 30 keV carbon ions, for different sample temperatures in the range 35-300 K. Blue band-Aluminescence decays with irradiation dose from an initial value of -10e3 photons/e-h pair. This decay was modeled to obtain an effective damage cross section of -40 A2, which...
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The luminescence associated with an absorption band at about 3.0 eV in chalcogen-doped TlCl has been observed. The temperature and pressure coefficients of the positions of the absorption and emission peaks have been found to have "anomalous" negative signs. The temperature coefficient of the absorption peak is dominated by the effect of thermal expansion, the band shifting toward the blue as t...
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Spectroscopic properties of germanium oxygen-deficient centers were studied in vapor axial deposition and modified chemical-vapor deposition germanosilicate glass after hydrostatic densification by as much as 19%. Gaussian decomposition showed a broadening and a significant shift of the initial absorption bands at 5.11 and 5.42 eV. A threefold decrease of the 3.15-eV luminescence band was revea...
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ژورنال
عنوان ژورنال: Reports on Progress in Physics
سال: 1979
ISSN: 0034-4885,1361-6633
DOI: 10.1088/0034-4885/42/10/001