Photon-gated photochemical hole burning by two-color sensitization in an azide polymer matrix

Photon-gated photochemical hole burning by electron transfer reaction : zinc tetratolyltetrabenzoporphine in poly(chloromethylstyrene)

Intermolecular photoprocesses in glassy solutions of magnesium octaethylporphine (MgOEP) and zinc tetrabenzoporphine (ZnTBP) have been investigated under one- and two-color irradiation between 8 an...

Hole-Burning Study of Primary Photochemistry of Metalloporphyrins in Reactive Solvent Glasses

Dependence of persistent spectral hole-burning efficiency on free energy release for organic donor—acceptor systems

Nonlinear absorption of the organic material Zn-tetrabenzoporphin-crotonicacid-phenoxy resin (ZnTBP-CA-PhR) in the donor-acceptor energy-transfer (DA-ET) system is investigated by the irradiation of Ar+ laser on its solid film. A reverse saturable absorption and an enhanced second reverse saturable absorption called the rereverse saturable absorption are observed in a visible wavelength range. The high performance of optical limiting of the sample possessing low input threshold and an over 95% linear transmission ratio are observed. The physical mechanism of rereverse saturable absorption is analysed by a five-level rate-equation simulating. According to the Huygens wave diffraction principle and the combination of Kerr effect, thermo-optic effect and optical absorption variation, a mathematical model for the optical limiting of ZnTBP-CA-PhR film limiter is established and the theoretical simulating gives a good agreement with the experimental results.

Enhanced Nonlinear Absorption and Optical Limiting Properties of Organic Material ZnTBP-CA-PhR in a DA-ET System

Persistent spectral hole-burning with two-color excitation was performed at 20K for zinc-tetrabenzoporphin with crotonic acid in phenoxy resin. The presence of carboxylic acid provides the enhancement of hole formation by two-color excitation and the thermal stability of the rsulting holes, raising a non-photochemical hole burning with the rearrangement of strong hydrogen bonds in the carboxylic acid

Photon-Gated Persistent Spectral Hole-Burning of Zinc-Tetrabenzoporphin with Crotonic Acid in Phenoxy Resin.

A study on multiple photon-gated persistent spectral hole burning and photoproduct in a system of frequency-domain storage material

The temperature dependence properties of a new persistent spectral hole-burning system, Zn-tetrabenzoporphin-crotonic acid/phenoxy resin, are studied at temperatures from 20 to 100 K. Being annealed at different temperatures up to 80 K, the hole shape can partly recover at 20 K. The degree of hole recovery decreases as the annealing temperature is raised from 20 K. Two kinds of processes, reversible and irreversible, exist during the changing of the hole shape in the cycle annealing experiments.

The temperature dependence of photon-gated spectral hole burning for the Zn-tetrabenzoporphin-crotonic acid/phenoxy resin

Two-color persistent spectral hole-burning was achieved for the first time for a new system Zn-tetrabenzoporphin-crotonic acid/phenoxy resin at 20 K. The time dependence experiments show that the spectral holes are persistent at the temperature of 20 K. These holes can be erased by laser irradiation and reversible holeburning is performed. The hole width remains almost constant during the erasing process.

A new system of photon-gated persistent spectral hole burning material for frequency-domain optical storage

Spectroscopic study was carried out on a highly efficient photon-gated persistent hole-burning material, Zn-tetrabenzoporphyrin/crotonic acid/phenoxy resin film, at liquid helium temperature. Deep holes were burnt displaying a relative change of transmittance of 2000% and that of optical density of 0.94. Hole erasing caused by Ar + laser irradiation was observed. Laser-induced donor-acceptor electron transfer was determined to be responsible for the hole formation. The photoproduct was found to be rather stable against room-temperature cycling

Shaoming Yao

Papers

Photon-Gated Persistent Spectral Hole-Burning of Zinc-Tetrabenzoporphin with Crotonic Acid in Phenoxy Resin.

A study on multiple photon-gated persistent spectral hole burning and photoproduct in a system of frequency-domain storage material

The temperature dependence of photon-gated spectral hole burning for the Zn-tetrabenzoporphin-crotonic acid/phenoxy resin

A new system of photon-gated persistent spectral hole burning material for frequency-domain optical storage

Spectroscopic Study on ZnTBP/CA/PhR Film by Photon-Gated Hole Burning