Correlation-Induced Spectral Changes in Tissues

Ruoyu Zhu, Shamira Sridharan, Krishnarao Tangella, Andre Balla, and Gabriel Popescu
Opt. Lett. 2011 36(21) 4209 https://doi.org/10.1364/OL.36.004209

We report experimental evidence of correlation-induced spectral changes in biological tissues. The overall spectral shift in our transmission measurements is to the red and the mean wavelength of the original spectrum is up 10% larger. These results indicate that the spectral changes due to elastic scattering are significant and likely to hinder all spectroscopic measurements based on the inelastic (i.e., emission and absorption) interaction between light and tissues. Thus, simultaneous morphology and spectral measurements are required for accurate measurements spectroscopic information.