Theoretical calculations of the pressure-induced shift of a photoacoustic phase signal in alexandrite (BeAl2O4:Cr3+)

Abstract

The effect of pressure on the phase (δ) of the photoacoustic signal in alexandrite was considered theoretically. It is shown that increase of pressure induces a non-linear increase of δ. The possibility of using the normalized phase difference shift of the photoacoustic signal in alexandrite upon pressure as a new method for high-pressure measurement in the diamond anvil cell is discussed.