TY  - JOUR
A1  - Koenig, Tobias
A1  - Goldenberg, Leonid M.
A1  - Kulikovska, Olga
A1  - Kulikovsky, Lazar
A1  - Stumpe, Joachim
A1  - Santer, Svetlana
T1  - Reversible structuring of photosensitive polymer films by surface plasmon near field radiation
JF  - Soft matter
N2  - We report on the fabrication and characterisation of a novel type of hybrid azo-modified photosensitive polymer film with a nanoscale metallic structuring integrated into the substrate. The metal structures permit to generate surface plasmon near fields when irradiated by UV-light from the rear without directly illuminating the polymer. This allows establishment of a localized, complex-shape intensity distribution at sub-wavelength resolution with a corresponding impact on the photosensitive polymer. The possibilities of exploiting this setup are manifold. We find that just by using the change of polarization of the incident light as means of control, the topography can be driven to change between various patterns reversibly. These results are confirmed by numerical simulations and compared with in situ recorded topography changes.
Y1  - 2011
U6  - https://doi.org/10.1039/c0sm01164a
SN  - 1744-683X
VL  - 7
IS  - 9
SP  - 4174
EP  - 4178
PB  - Royal Society of Chemistry
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Kulikovsky, Lazar
A1  - Neher, Dieter
A1  - Mecher, E.
A1  - Meerholz, Klaus
A1  - Horhold, H. H.
A1  - Ostroverkhova, O.
T1  - Photocurrent dynamics in a poly(phenylene vinylene)-based photorefractive composite
N2  - All parameters describing the charge carrier dynamics in a poly(phenylene vinylene)-based photorefractive (PR) composite relevant to PR grating dynamics were determined using photoconductivity studies under various illumination conditions. In particular, the values of the coefficients for trap filling and recombination of charges with ionized sensitizer molecules could be extracted independently. It is concluded that the PR growth time without preillumination is mostly determined by the competition between deep trap filling and recombination with ionized sensitizer molecules. Further, the pronounced increase in PR speed upon homogeneous preillumination (gating) as reported recently is quantitatively explained by deep trap filling
Y1  - 2004
SN  - 1098-0121
ER  -