Singlet excited state absorption of porphyrin molecules for pico- and femtosecond optical limiting application

Abstract

Two-photon induced excited-state absorption and optical limiting properties in a chiral polymer Appl. Phys. Lett. 102, 043308 (2013); 10.1063/1.4790391Spectral dependence of third order nonlinear optical susceptibility of zinc phthalocyanine This work employs the Z-scan technique with 120 fs pulses to investigate the singlet excited state absorption spectra of tetrapyridyl and tetrasulfonatophenyl porphyrins. We have used a three-energy-level model to adjust Z-scan curves in order to obtain the singlet excited absorption cross section from 460 to 800 nm. Starting from these values, we determine the spectra of the ratio between excited and ground singlet state absorption cross sections, whose values are as good as the best found in the literature for reverse saturable absorbers. The results obtained point these porphyrins as good candidates for applications in optical limiting of ultrashort pulses.

Investigation of the photophysical and eletrochemical properties of a free base tetrapyridyl porphyrin with meso carbon linked ruthenium(II) groups

“…Efforts in this direction have been made through changes of the central ion [11,12], aggregate formation [13,14], insertion of lateral and axial ligands [15,16], oligomers [17], supramolecular isomeric structures [10,[18][19][20], presence of cationic groups [21,22], and others. In order to better understand the impact of structural modification on porphyrins systematic studies of their photophysical and photochemical properties is highly necessary.…”

Effects of environment on the photophysical characteristics of mesotetrakis methylpyridiniumyl porphyrin (TMPyP)

“…Such porphyrins can be considered to be simple models of more complex molecules, which, nevertheless, permit to make adequate conclusions about general porphyrin characteristics, including the effect of porphyrin interaction with other structures, their aggregation, etc. Moreover, simple symmetric porphyrins are low-cost materials and depending on the application, demonstrate high efficiency, such as for optical devices [1][2][3][4][5]. Specifically, porphyrins/micelles interaction is of interest because micelles can been considered as a model of biological membrane [18][19][20], and, also because they as a matrix for active optical molecular systems [13,21].…”

“…For instance, porphyrins are promising for the development of nonlinear photonic devices, such as optical limiters [1][2][3] and optical switches [4,5], because of the high optical nonlinearities arising from their structures presenting extended -conjugated systems [6,7]. Moreover, owing to their specific photophysical properties, such as intense optical absorption in the visible spectral region and high triplet state quantum yield, porphyrins are applied in medicine and pharmacology as fluorescence probes in cancer fluorescence diagnostic (photodynamic diagnostics, PDD) and photosensitizers in photodynamic therapy (PDT) [8,9].…”

Effect of protonation on the singlet–singlet excited-state absorption of meso-tetrakis(p-sulphonatophenyl) porphyrin

“…Moreover, their chemical structures permit easy manipulation to yield desirable properties for specific applications at relatively low fabrication cost. Among porphyrins, the water-soluble meso-tetrakis(p-sulphonatophenyl) porphyrin (TPPS 4 ) was found to be a promising material for photonics (optical limiters) and medical (photodynamic therapy -PDT) applications [3][4][5][6]. Owing to the presence of nitrogen atoms in its structure, TPPS 4 can suffer double protonation with two nearby pK points in the vicinity of pH 5.2 [7].…”