Optical studies of the 1.945 eV vibronic band in diamond

1976/02/24 by G. Davies, M. Hamer, M. F. Hamer · 677 citations
Chemistry · Earth and Planetary Sciences · Engineering · Materials Science · #Absorption band #Advanced Surface Polishing Techniques #Annealing (glass) #Atom (system on chip) #Atomic physics #Chemistry #Crystallography #Diamond #Diamond and Carbon-based Materials Research #Excitation #Excited state #Ground state #High-pressure geophysics and materials #Luminescence #Materials science #Molecular physics #Nitrogen #Nitrogen atom #Optics #Optoelectronics #Physics #Vacancy defect

paper · doi:10.1098/rspa.1976.0039

published in Proceedings of the Royal Society of London A Mathematical and Physical Sciences 348(1653), 285-298 (Royal Society)

openalex publication_date 1976/02/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/28

Abstract

Abstract The 1.945eV band is the dominant end product of annealing radiation damage in diamonds containing isolated substitutional nitrogen atoms. In this paper uniaxial stress experiments are described which show the band to be a transition between A1 (ground) and E (excited) electronic states of a trigonal centre, the E state being coupled predominantly to A1 modes of vibration. Annealing experiments suggest that the centre is either a substitutional nitrogen atom plus an interstitial nitrogen atom, or a substitutional nitrogen atom plus a vacancy. Small differences between the luminescence and absorption bands are shown to be consistent with the double minima vibrational potential of the nitrogenvacancy model.

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