Up‐conversion Luminescence in Dye‐Doped Crystals of Potassium Hydrogen Phthalate
- 30 June 2003
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 15 (13) , 1068-1070
- https://doi.org/10.1002/adma.200303715
Abstract
Optically nonlinear single crystals of potassium hydrogen phthalate were grown in the presence of a variety of laser dyes. Up‐conversion fluorescence (as shown in the Figure) in the visible part of the spectrum was observed as a result of two excitation mechanisms involving trapped, oriented luminophores: two‐photon absorption in general orientations, and absorption of the second harmonic of the fundamental beam at 800 nm, when aligned with the phase‐matching direction.Keywords
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