Evaluation of a polarization-sensitive, dual-wavelength wearable photoplethysmography sensor across a range of skin tones. - Jakachira, Rutendo; Yan, Wenyuan; Thomas, Sian C.; Macias-Sanchez, Yareli; Werner, Lovisa; Burrow, Joshua A.; Dunsiger, Shira; Toussaint Jr., Kimani C. (Biophotonics Discovery, 2026)