toggle visibility Search & Display Options

Select All    Deselect All
 |   | 
Details
   print
  Record Links
Author (up) Nöllmann, M.; Shalom, D.; Etchegoin, P.; Sereni, J.G. doi  openurl
  Title Photobleaching and reorientational dynamics of dyes in a nematic liquid crystal Type Journal Article
  Year 1999 Publication Physical Review E Abbreviated Journal Phys. Rev. E  
  Volume 59 Issue Pages 1850  
  Keywords  
  Abstract The polarized fluorescence of excited dyes in a prototype nematic liquid crystal is studied as a function of temperature, polarization of the light, and laser wavelength. We show explicitly the coexistence of photobleaching and dye diffusion through the nematic host as two mechanisms influencing the magnitude of the fluorescence signal. In addition, we exhibit clear evidence of the presence of a torque at low input laser powers that twist the dye molecules with respect to the director orientation of the liquid crystal, if the dyes are resonantly excited. The fluorescence emission in this latter case is able to perceive the birefringence of the nematic liquid crystal host, and this is shown as clear oscillations in the polarized fluorescence as a function of temperature. Extensive qualitative comparisons of the experimental results with the mean-field Maier-Saupe theory of the nematic state are presented, and a model is proposed to account for the observations.  
  Address  
  Corporate Author Thesis  
  Publisher Place of Publication Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number BT @ pedrazp @ Serial 686  
Permanent link to this record
Select All    Deselect All
 |   | 
Details
   print

Save Citations:
Export Records: