Photochemical and Photophysical Dynamics of Persistent Spectral Hole-Burning,Photorefractivity and Single Molecular Absorbers in Condensed Matter

摘要

During the period of this contract, the following milestones have been achieved:the first detailed studies of hole-burning bottlenecks for organic and inorganic systems; first use of high resolution ultrasonic modulation to detect photochemical holes; first observation of photochemical hole production in 100 ns; first complete analysis of coupled reading-writing constraints for single-photon hole-burning materials leading to the need for photon-gating; first observation of photon-gated hole-burning in an organic system; first observation of photon-gating via a donor-acceptor electron transfer mechanism, which allows fast (30 ns) hole formation in small focused laser spots; first observation of statistical fine structure in an inhomogeneously broadened spectral line; first optical detection and spectroscopy of a single impurity molecular in a solid; first temperature dependence of photon-gating to 90 K; first intracavity second harmonic generation in an organic crystal; first phase-sensitive, time-resolved study of ballistic phonon propagation in a solid; first direct observation of spectral diffusion in a solid using a single-molecule probe.