The refractive index of purple membranes in a water suspension has been measured refractometrically in the visible range of the spectrum. A region of anomalous dispersion has been found, due to a strong absorption by the retinal residue in bacteriorhodopsin macromolecules.
© 2010 Optical Society of America
Original Manuscript: August 12, 2009
Revised Manuscript: November 9, 2009
Manuscript Accepted: December 2, 2009
Published: January 8, 2010
Vol. 5, Iss. 3 Virtual Journal for Biomedical Optics
Alexandar Metodiev Zhivkov, "Abnormal dispersion of refractive index of purple membranes in an aqueous medium," Appl. Opt. 49, 272-274 (2010)