Third-order nonlinear optical response in polymer thin films incorporating porphyrin derivatives

Norwood, Robert A.; Sounik, James R.

doi:10.1063/1.106690

Cited by 82 publications

(32 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…6,[11][12][13][14] However, direct measurements using either time-correlated single photon counting (TCSPC) 15 or pump-probe transient method 16,17 are the most accurate methods for measuring subnanosecond s . In this letter, we report the measurement of the lifetimes ͑ s ͒ of S 1 of the ͓͑R-APPC͒M͔Cl n complexes using laser excitation fluorescence in which the fluorescent relaxation of S 1 was monitored by TCSPC.…”

mentioning

confidence: 99%

Excited state lifetime and intersystem crossing rate of asymmetric pentaazadentate porphyrin-like metal complexes

Byeon

McKerns

Sun

et al. 2004

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

Excited state lifetime and intersystem crossing rate of asymmetric pentaazadentate porphyrin-like metal complexes

Byeon

McKerns

Sun

et al. 2004

Applied Physics Letters

View full text Add to dashboard Cite

show abstract

“…Furthermore, the possibility to orient dipole moments of dye molecules embedded within asymmetric lipid bilayers potentially makes these systems interesting for nonlinear optical (including second-harmonic generation) studies. [36,37] Our current work is focused on the preparation of free-standing liposomes of asymmetric bilayers by employing decomposable PEs.…”

mentioning

confidence: 99%

Monodisperse Polyelectrolyte‐Supported Asymmetric Lipid‐Bilayer Vesicles

Katagiri

Caruso²

2005

Advanced Materials

View full text Add to dashboard Cite

Cataposit 44 (Shipley) in water. After 10 min the fibers were recovered by filtration and suspended in a wash solution of Cataprep 404. Filtration was repeated and followed with 4 washes with 1 L of water. The final filter cake was freeze-dried to yield a fine light-gray powder. The electroless copper-plating bath was Fidelity 1025. Dry fibers were added at the concentrations specified in the text and subjected to continuous stirring. Once exhausted the reaction mixture was filtered, and the fibers washed copiously with water and freeze-dried.Absolute density was determined by water displacement. A known mass of fibers was placed in a pre-weighed graduated cylinder. Water was added to a total known volume (bubbles were removed by subjecting the cylinder to vacuum). The volume of water was determined by re-weighing the cylinder. The volume occupied by the fibers was determined by subtracting the volume of water from the total volume.An approximation of the conductivity of the metal plated onto cellulose was determined by use of a Spectra/Por cellulose membrane (Spectrum) as a surrogate material. Measurement of the conductivity of individual fibers is impractical, and the conductivity of bulk fiber is dominated by contact resistance. A membrane of 10 mm width and 8.5 cm long was plated with electroless copper essentially as described above. The final thickness was 30.5 lm, with a copper layer on both sides of less than 100 nm (as determined by weight gain). The resistance of this membrane was 3.5 X, which corresponds to a conductivity of 8.1 10 5 X ±1 m ±1 . Sample composites were fabricated by adding the requisite mass of fibers to polyurethane LS-40 (BJB Enterprises) to yield the desired volume percentage. Moldings were made between two flat plates, with shims to determine the thickness. Samples were cured for 24 h at room temperature. Electromagnetic measurements were conducted with a Hewlett-Packard 8510 Network Analyzer and permittivities were calculated by the Nicholson-Ross technique [14]. Samples were 1.27 mm thick and toroidal, with an inner diameter of 3 mm and an outer diameter of 7 mm and measured in a coaxial cable arrangement.DC conductivity of the composites was measured across the thickness of the samples (1.27 mm) between metal plates of 5 cm by 1.8 cm in dimension. Measurements were made with a Keithley 194 A Digital Multimeter. The limit of detection was approximately 3 10 ±10 X ±1 m ±1 .

show abstract

“…Recently, tetrapyrrolic macrocyclic molecules, as for example metalled (MP) and free (H 2 P) porphyrins and their phthalocyanine similes (MPc, H 2 Pc), have received considerable attention because of their non-linear optical properties [7][8][9][10] and the feasibility of using them as optical limiters [11,12] and high density optical information storage systems [13].…”

Section: Introductionmentioning

confidence: 99%