The microscopic interaction parameters for Er3+/Ho3+ energy transfer in tellurite glasses

We investigate the energy transfer between Er3+/Ho3+ in tellurite glasses. The main channels of energy transfer between Er3+/Ho3+ are analyzed in detail. The microscopic interaction parameters of resonant and non-resonant (phonon-assisted) energy transfer parameters via Er3+→Ho3+ are calculated. The result shows that the resonant energy transfers Er3+(2H11/2(4S3/2))→Ho3+(5F4(5S2)) and Er3+(4F9/2)→Ho3+(5F5) are very efficient and non-resonant energy transfers Er3+(4I13/2)→Ho3+(5I7) and Er3+(4I11/2)→Ho3+(5I6), which are a phonon-assisted energy transfer process because of energy mismatch are also existed and cannot be neglected.