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SiV Color Centers in Si‐Doped Isotopically Enriched 12 C and 13 C CVD Diamonds
Author(s) -
Sedov Vadim,
Boldyrev Kirill,
Krivobok Vladimir,
Nikolaev Sergei,
Bolshakov Andrey,
Khomich Alex,
Khomich Andrew,
Krasilnikov Anatoly,
Ralchenko Victor
Publication year - 2017
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201700198
Subject(s) - diamond , analytical chemistry (journal) , materials science , photoluminescence , full width at half maximum , doping , absorption (acoustics) , absorption spectroscopy , chemistry , optics , optoelectronics , physics , chromatography , composite material
The effect of isotopic modification of diamond lattice on photoluminescence (PL) and optical absorption spectra of ensembles of SiV − centers was studied. Thin epitaxial diamond layers were grown by a microwave plasma CH 4 /H 2 mixtures using methane enriched to 99.96% for either 12 C or 13 C isotopes, while the Si doping was performed by adding a small percentage of silane SiH 4 into the plasma. Temperature dependent SiV − ZPL spectra in absorption were measured at 3–80 K to monitor the evolution of the ZPL fine structure. It is found that the SiV − ZPL at 736.9 nm observed in PL for 12 C diamond at T = 5 K, exhibits a blue shift of 1.78 meV, to 736.1 nm in 13 C diamond matrix. Narrow ZPL with the width (FWHM) of 0.09 meV (21 GHz) was measured in absorption spectra at T = 3–30 K in the Si‐doped 13 C diamond. Besides the charged SiV − center, the absorption of the neutral SiV 0 defect at 946 nm wavelength has also been detected. From changes observed in SiV − phonon band structure in PL with isotopic modification, the band at 64 meV was confirmed to be a local vibration mode (LVM) involving a Si atom.