Optical properties of SiV and GeV color centers in nanodiamonds under hydrostatic pressures up to 180 GPa
Baptiste Vindolet, Marie‐Pierre Adam, Loïc Toraille, Mayeul Chipaux, Antoine Hilberer, Géraud Dupuy, Lukas Razinkovas, Audrius Alkauskas, Gergő Thiering, Ádám Gali, Mary De Feudis, Midrel Wilfried Ngandeu Ngambou, Jocelyn Achard, Alexandre Tallaire, Martin Schmidt, Christoph Becher, Jean-François Roch
Abstract
The silicon-vacancy (SiV) and germanium-vacancy (GeV) centers in diamond have a sharp photoluminescence with high brightness. In this work, the photoluminescence of these centers is measured up to 180 GPa using nanodiamonds integrated in a diamond anvil cell. The results show blueshifts in the mean emission energy determined by the atomic radii of the impurity. The agreement with $a\phantom{\rule{0}{0ex}}b$ $i\phantom{\rule{0}{0ex}}n\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}t\phantom{\rule{0}{0ex}}i\phantom{\rule{0}{0ex}}o$ calculations based on the lattice compression of diamond demonstrates the potential of these centers for sensing under extreme pressure conditions.