21 citations · 118 across the 22 of their papers we have counts for
1 paper · 1 filter
V. Yu. Shishkov, E. S. Andrianov, A. A. Pukhov +2
The phenomenon of upconversion, in which a system sequentially absorbs two or more photons and emits a photon of a higher frequency, has been used in numerous applications. These i…