Scientific Reports (May 2023)

Enhancing the upconversion efficiency of NaYF4:Yb,Er microparticles for infrared vision applications

  • Keyvan Khosh Abady,
  • Dinesh Dankhar,
  • Arjun Krishnamoorthi,
  • Peter M. Rentzepis

DOI
https://doi.org/10.1038/s41598-023-35164-x
Journal volume & issue
Vol. 13, no. 1
pp. 1 – 8

Abstract

Read online

Abstract In this study, (NaYF4:Yb,Er) microparticles dispersed in water and ethanol, were used to generate 540 nm visible light from 980 nm infrared light by means of a nonlinear stepwise two-photon process. IR-reflecting mirrors placed on four sides of the cuvette that contained the microparticles increased the intensity of the upconverted 540 nm light by a factor of three. We also designed and constructed microparticle-coated lenses that can be used as eyeglasses, making it possible to see rather intense infrared light images that are converted to visible.