Microstructuration of nonlinear optical materials: methodologies, characterization, and applications
- Autores: Raj Kumar Golconda
- Directores de la Tesis: Joan J. Carvajal (dir. tes.), Magdalena Aguiló Diaz (dir. tes.)
- Lectura: En la Universitat Rovira i Virgili ( España ) en 2012
- Idioma: inglés
- Tribunal Calificador de la Tesis: Francesc Díaz i González (presid.), Patricia Segonds (secret.), Velin Nikolov (voc.)
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
One and two dimensional microstructures were fabricated by ultrafast laser ablation on KTiOPO4 and RbTiOPO4, and by selective chemical etching on LiNbO3 single crystals to investigate the diffractive properties associated to the nonlinear optical properties of these materials. Asymmetric diffraction patterns were obtained for the second harmonic generated by the samples after illumination with an IR laser beam. We also explored a possible application for these structures as it is the development of RGBY laser phosphor displays. To do that, we embedded luminescent nanoparticles doped with lanthanide ions, and synthesized by the sol-gel Pechini method, into the micrometer holes inscribed on the surface of KTiOPO4 and RbTiOPO4. In this way, multicolor light emissions can be controlled spatially at the micrometer scale. The RGBY colors were generated by using different up-conversion mechanisms by pumping in the infrared, with several advantages to the current laser phosphor display technology pumped in the UV.
