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THz optical properties of Asian, Black, and Caucasian donor tissue models with a different content of melanin grown in vitro for 16 days: (a) measurements on Day 2, (b) on Day 16; (c) THz optical properties of water, skin, and collagen obtained from the double Debye model. Insets: fits from the double Debye model. Reproduced from Ref. 85, © 2019 Optical Society of America.
