New Generation Photonics Materials: Design, Development, Characterization, and Applications

摘要

Significant research achievements have been accomplished in development of multi-photon active materials and applications as well as of novel nanocomposites materials for opt-electronic technology. The specific research progress achieved by this grant support can be summarized as follows. (I) Nonlinear optical limiting and stabilization of 1064-nm laser pulses using a novel two-photon absorbing liquid dye salt system. The major advantage of using a neat liquid dye salt as the two-photon absorbing medium is that the effective molar concentration can be increased by two orders of magnitude and it can withstand much higher input laser energy and intensity. (II) A new-type stimulated Rayleigh-Bragg scattering generated in a novel two-photon absorbing dye solution. It is a two-photon excitation enhanced backward stimulated Rayleigh scattering in a non linearly absorbing dye solution. This stimulated scattering shows no frequency shift and therefore is different from most of other known stimulated scattering processes. The principle of this effect can be highly useful for optical phase-conjugation technique and optical power limiting applications. (III) Synthesis, two- and three photon absorption, and optical limiting properties of fluorene containing ferrocene derivatives and novel dendritic structures. These newly designed and synthesized systems have provided a considerably improved two- and three photon absorption cross-section values, and demonstrated good optical power limiting behavior in fs-regime for both 775-nm and 1300-nm wavelengths.