Diode laser pumped Gd₂O₃:Er3+/Yb3+ phosphor as optical nano-heater

摘要

An intense green upconversion (UC) emission (λ _exc=976 nm) followed by the heating effect in Yb3+/Er3+ co-doped Gd₂O₃ nanoparticles has been detected. A temperature rise up to 504 K has been observed (on a noteworthy low laser excitation of 290 mW) using fluorescence intensity ratio (FIR) method of the thermalized UC luminescence bands 2H_11/2→4I_15/2 and 4S_3/2→4I_15/2 of Er3+ ion. The reported controlled optical heating of nanoparticles and its nano-volume has potential applications in biomedicines and in the creation of holes in soft materials.