Targeted alteration of real and imaginary refractive index of biological cells by histological staining

L. Cherkezyan, H. Subramanian, V. Stoyneva, J. D. Rogers, S. Yang, D. Damania, A. Taflove, V. Backman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Various staining techniques are commonly used in biomedical research to investigate cellular morphology. By inducing absorption of light, staining dyes change the intracellular refractive index due to the Kramers-Kronig relationship. We present a method for creating 2D maps of real and imaginary refractive indices of stained biological cells using their thickness and absorptance. We validate our technique on dyed polystyrene microspheres and quantify the alteration in refractive index of stained biological cells. We reveal that specific staining of individual organelles can increase their scattering cross-section by orders of magnitudes, implying a major impact in the field of biophotonics.

Original languageEnglish (US)
Pages (from-to)1601-1603
Number of pages3
JournalOptics Letters
Volume37
Issue number10
DOIs
StatePublished - May 15 2012

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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