| Issue |
EPL
Volume 88, Number 5, December 2009
|
|
|---|---|---|
| Article Number | 56003 | |
| Number of page(s) | 6 | |
| Section | Condensed Matter: Structural, Mechanical and Thermal Properties | |
| DOI | https://doi.org/10.1209/0295-5075/88/56003 | |
| Published online | 11 December 2009 | |
Investigation of enhancement of photoinduced reorientation of liquid-crystal molecules in the presence of azo-dye and gold nanoparticles
Institute of Physical and Theoretical Chemistry, Wroclaw University of Technology - Wybrzeze Wyspianskiego 27, 50-370 Wroclaw, Poland, EU
Corresponding author: pawel.karpinski@pwr.wroc.pl
Received:
25
September
2009
Accepted:
13
November
2009
The optical-Kerr-effect configuration is used to study the enhancement of photo-induced molecular reorientation in a twisted nematic liquid crystal due to the presence of metal nanoparticles. The system consisting of a liquid crystal with photoisomerizable dye Disperse Orange 3 shows an enhancement of the Kerr-like response at 532 nm excitation light when doped with 15 nm in size gold nanoparticles. A simple theoretical model predicting the behavior and magnitude of the expected response has been formulated. The contribution of localized surface plasmon of gold nanoparticles to light-induced torque is discussed.
PACS: 61.30.-v – Liquid crystals / 42.65.-k – Nonlinear optics / 77.84.Nh – Liquids, emulsions, and suspensions; liquid crystals
© EPLA, 2009
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