Bright luminescence of diamonds with Ge-V centers

K. N. Boldyrev, B. N. Mavrin, P. S. Sherin, M. N. Popova

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)

Abstract

We report on the quantum yield (η) and decay time (τ) measurements at room temperature for the bright red-orange (602 nm) luminescence from new germanium-vacancy (Ge-V) centers in nano- and microcrystalline diamonds synthesized at high pressure and high temperature. The values η = 3 ± 1% and τ = 6.2±0.2 ns were found. The Stokes shift measured as the energy difference between the maxima of the luminescence and luminescence excitation spectra is negligible. The relative intensity of the zero-phonon line constitutes up to 70% of the total intensity of the luminescence. Results of our ab initio DFT calculations for the ground-state electronic and vibrational structure of (Ge-V)- in diamond are presented and discussed.

Original languageEnglish
Pages (from-to)119-124
Number of pages6
JournalJournal of Luminescence
Volume193
DOIs
Publication statusPublished - 1 Jan 2018

Keywords

  • ab initio DFT calculations
  • Diamond
  • Germanium-vacancy centers
  • Luminescence
  • Quantum yield
  • Stokes shift
  • VACANCY COLOR-CENTER
  • GERMANIUM
  • FILMS
  • QUBITS

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