Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5442419 | Optical Materials | 2017 | 6 Pages |
Abstract
An analytic absorption function was derived to investigate the dynamics of photoisomerization in a poly(methyl methacrylate) thin film doped with disperse orange 3 (DO3). The temporal absorption measured using the pump-probe method was well-behaved, following an analytic function with a single exponential term. The isomerization and thermal-relaxation rates were evaluated by curve-fitting. The analytic absorption function was validated by measuring the thermal-relaxation rates with the pump separately on and off. Using this function, an analytic method for determining the photoisomerization parameters was demonstrated: for DO3 in poly(methyl methacrylate), the photoisomerization quantum yields for trans-cis and cis-trans processes were determined to be ÏTC=0.12±0.01 and ÏCT=0.77±0.06, respectively. The absorption cross section for the cis isomer was measured to be ÏC=(0.92±0.03)Ã10â16cm2. This analytic method can thus be used to characterize the dynamics of photoisomerization in dye doped thin films.
Related Topics
Physical Sciences and Engineering
Materials Science
Ceramics and Composites
Authors
Yang Wu, Jun Ho Cha, Hyun Kwan Shim, Hyo Jin Seo, Sun Il Kim,