Abstract
We report the enhancement of the blue upconversion emission in a codoped fluoroindate glass covered with silica microspheres. Each microsphere produces a photonic nanojet that concentrates the illuminating beam in a tiny region of the glass, increasing the intensity per unit area and so the upconversion emission by a factor of 3. Moreover, the mean size of the emission area has been reduced by a factor of due to the three-photon process involved in the blue emission band. The experimental values of the full width at half-maximum of the emission spots have been found to be in agreement with the theoretical values obtained from finite-difference time-domain simulations.
© 2013 Optical Society of America
Full Article | PDF ArticleMore Like This
C. Pérez-Rodríguez, S. Ríos, I. R. Martín, L. L. Martín, P. Haro-González, and D. Jaque
Opt. Express 21(9) 10667-10675 (2013)
Qianqian Duan, Feng Qin, Peng Wang, Zhiguo Zhang, and Wenwu Cao
J. Opt. Soc. Am. B 30(2) 456-459 (2013)
Gomes S. N. Eliel, Kagola Upendra Kumar, Paulo T. Udo, Nelson G. C. Astrath, Luis Carlos Malacarne, Mauro L. Baesso, Tomaz Catunda, Richard Moncorgé, and Carlos Jacinto
J. Opt. Soc. Am. B 30(5) 1322-1328 (2013)