title: In vivo measurement of mid-infrared light scattering from human skin.
abstract: Two mid-infrared light sources, a broadband source from a Fourier Transform Infrared Spectrometer (FTIR) and a pulsed Quantum Cascade (QC) Laser, are used to measure angle-resolved backscattering in vivo from human skin across a broad spectral range. Scattering profiles measured using the FTIR suggest limited penetration of the light into the skin, with most of the light interacting with the stratum corneum layer of the epidermis. Scattering profiles from the QC laser show modulation patterns with angle suggesting interaction with scattering centers in the skin. The scattering is attributed to interaction of the laser light with components such as collagen fibers and capillaries in the dermis layer of the skin.
authors.affiliation: Princeton Institute for the Science and Technology of Materials, Princeton University, Princeton, NJ 08540, USA ; Current Address: Department of Applied Ocean Physics and Engineering, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, USA.
authors.forename: Anna P M
authors.initials: AP
authors.lastname: Michel
authors.forename: Sabbir
authors.initials: S
authors.lastname: Liakat
authors.forename: Kevin
authors.initials: K
authors.lastname: Bors
authors.forename: Claire F
authors.initials: CF
authors.lastname: Gmachl
keywords: (140.5965) Semiconductor lasers, quantum cascade; (170.6930) Tissue; (290.5820) Scattering measurements