KLuS 2 solitary crystal samples undoped and doped by using a reduced (five %) or significant (38 %) focus of trivalent thulium or ytterbium ions ended up synthesized in the form of thin hexagonal plates. The reduced phonon energy (�?20 cm ⁻�?) was confirmed utilizing Raman spectroscopy. Samples have been studied also by using optical absorpti… Read More