Dispersion of anomalous azimuthal rotation and circular extinction contrast in dyed K2SO4 crystals

Werner Kaminsky, Javier Herreros-Cedrés, Morten A. Geday, Bart Kahr

Research output: Contribution to journalArticlepeer-review


We present measurements of the dispersion of anomalous azimuthal rotation signals from dyed crystals that are at variance with our predictions based on a model of these effects predicated on the predominance of Rayleigh scattering from isolated dye molecules (Kaminsky et al. J Phys Chem A 107:2800-2807, 2003). Here, we extend our scattering model to include the effects of the absorption and refraction of individual dyes that are inclined in a biased manner with respect to the eigenmodes of the medium. Our revised model describes the wavelength dependence of the rotations. It is likely that absorption, refraction, and Rayleigh scattering are all manifest, with absorption and refraction being the leading effects.

Original languageEnglish (US)
Pages (from-to)S55-S61
Issue numberSUPPL.
StatePublished - 2004


  • Azimuthal rotation
  • Circular extinction contrast
  • Dispersion
  • Dyed crystals
  • KSO
  • Trypan blue

ASJC Scopus subject areas

  • Analytical Chemistry
  • Catalysis
  • Pharmacology
  • Drug Discovery
  • Spectroscopy
  • Organic Chemistry


Dive into the research topics of 'Dispersion of anomalous azimuthal rotation and circular extinction contrast in dyed K<sub>2</sub>SO<sub>4</sub> crystals'. Together they form a unique fingerprint.

Cite this