4 papers
Donor-acceptor recombination in diamond
Konstantin Iakoubovskii, Andrey Katrusha, Weihua Peng +1
We re-examine several optical systems that have previously been attributed to donor-acceptor (D-A) recombination in diamond, including the broad 2.8 eV and 2.3 eV bands, and the sh…
Detection of acoustic phonons in carbon by Raman spectroscopy
Konstantin Iakoubovskii, Andrey Katrusha, Weihua Peng +1
We detected acoustic phonons in graphite and diamond by Raman spectroscopy supported by density functional theory calculations. The activation of these normally forbidden Raman mod…
HPHT growth of centimeter-sized cubic boron nitride crystals
Andrey Katrusha, Weihua Peng, Jianguo Peng +1
Single crystals of cubic boron nitride (cBN) exceeding 10 mm in size were grown by the high-pressure high-temperature (HPHT) temperature-gradient method using a Ni-Cr-based solvent…
Optical centers in cubic boron nitride and diamond: remarkable similarities
Konstantin Iakoubovskii, Andrey Katrusha, Weihua Peng +1
We present a comparative study of optical absorption and luminescence from cubic boron nitride (cBN) and diamond grown by the high-pressure high-temperature technique in the same c…