Mid-infrared (λ = 8.4-9.9 μm) light scattering from porcine tissue

Sabbir Liakat, Anna P.M. Michel, Kevin A. Bors, Claire F. Gmachl

Research output: Contribution to journalArticle

14 Scopus citations

Abstract

Back-scattering of mid-infrared light from porcine skin is studied versus wavelength and angle for a Quantum Cascade laser and a broadband infrared light source. Scattering is detected over 30° away from the specular angle for both sources, and modulation patterns with angle are seen when using the laser. A nonlinear increase in scattered light intensity versus input power indicates that directional scattering from within the skin is dominant. Collagen fibers in the dermis layer, over 200 μm deep into the skin, are conducive to such scattering. We conclude that mid-infrared light penetrates deep enough for potential glucose detection in dermal interstitial fluid.

Original languageEnglish (US)
Article number093705
JournalApplied Physics Letters
Volume101
Issue number9
DOIs
StatePublished - Aug 27 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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