Optical limiting in porphyrin and metaloporphyrin complexes / Limitação óptica em complexos de porfirina e metaloporfirina
AUTOR(ES)
Newton Martins Barbosa Neto
DATA DE PUBLICAÇÃO
2001
RESUMO
Optical limiters are devices with a high transmittance in the presence of low intensity light, and a considerable lower transmittance otherwise, been used as protectors against damage in optical sensors and human eyes. Aiming at searching for new materials and optical geometries efficient for optical limiting. We report on the development of an optical limiter based on the reverse saturable absorption in porphyrin and metalioporphyrins. We also built a device-based .on a cascade focus configuration, using free base porphyrin as the absorber. Besides, we obtain the excited state spectroscopy parameters by the theoretical fitting of transmittance curves, by solving a set of rate equations.
ASSUNTO(S)
excited state absorption porphyrins absorção de estados excitados optical limiting limitação óptica porfirinas
