Zobrazeno 1 - 7
of 7
pro vyhledávání: '"Kevin Roy Welford"'
Autor:
Kevin Roy Welford, Martin Heeney, Andrew N. Cammidge, Andrew D. Garland, Isabelle Chambrier, Michael J. Cook
Publikováno v:
Journal of Porphyrins and Phthalocyanines. :77-86
The synthesis and visible near-IR region absorption spectra of an 1,6,10,15,19,24,28,33-octaalkylnaphthalocyanine and examples of 3,4,12,13,21,22,30,31-octaalkyl and 3,4,12,13,21,22,30,31-octaalkoxy-2,3-naphthalocyanines are reported.
Autor:
Jim McMurdo, SD Haslam, John M. Simmons, Kevin Roy Welford, Richard H. Poynter, Michael J. Cook, David A. Miles, Robert M. Richardson
Publikováno v:
J. Mater. Chem.. 4:1205-1213
The monolayer and LB film-forming properties of 20 structurally related amphiphilic octa-substituted phthalocyanine derivatives have been assessed. The molecular packing within examples of the films has been probed by visible-region spectroscopy and
Publikováno v:
Applied Physics Letters. 71:10-12
We report a novel time resolved double pump–probe experimental technique that may be used to characterize the excited-state parameters of organic dyes. We show that by monitoring the time evolution of the transmittance of a dye after excitation wit
Publikováno v:
Applied Physics Letters. 66:1868-1870
Experimental and theoretical data are presented for the nonlinear absorption of the organic laser dye 1,1’,3,3,3’,3’‐hexamethylindotricarbocyanine iodide (HITCI) using a z‐scan technique. Experimental data show an induced absorption above l
Autor:
Kevin Roy Welford, Mark R. W. Venner, Peter V. Kolinsky, Derek F Croxall, Simon R. Hall, Stewart Swatton
Publikováno v:
MRS Proceedings. 374
This paper describes the development of high quality solid state optical components which have been made by the incorporation of the reverse saturable dye chloro aluminium phthalocyanine (CAP) into polymeric host material.In particular, the effect of
Publikováno v:
Le Journal de Physique Colloques. 49:C2-105
Publikováno v:
Applied Optics. 28:2796
Ultrahigh vacuum and molecular beam deposition techniques have been used to fabricate ZnSe interference filters. These demonstrate optical bistability with critical switching power being measured at five wavelengths between 521 and 676 nm. These filt