Host sensitized infrared quantum cutting of Er0.1Gd0.9VO4 crystal

The infrared quantum cutting phenomena of Er0.1Gd0.9VO4 crystal are studied in the present article. An interesting host sensitized infrared quantum cutting phenomenon is found, that is, there is a strong and broad excitation peak at 337.0 nm wavelength for its excitation spectrum of 1537.5 nm 4I13/24I15/2 infrared fluorescence. It can be recognized that the 337.0 nm excitation peak corresponds to the absorption of host GdVO4 crystal. Meanwhile, it is found that the integral fluorescence intensity of 1537.5 nm 4I13/24I15/2 infrared fluorescence, when the host absorption band is excited by 337.0 nm light, is about ten times larger than that of the sum of all other fluorescence intensities. Its infrared quantum cutting efficiency is similar to that of the excited 2H11/2 energy level and larger than that of others.