Frequency-dependent skin penetration depth of terahertz radiation determined by water sorption–desorption

Borwen You, Ching Yu Chen, Chin Ping Yu, Pei Hwa Wang, Ja Yu Lu

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)


A multilayered water–skin model is used to experimentally verify a new sensing method for determining the skin penetration depth of radiation with 0.1–0.9 terahertz (THz) frequencies. A water overlayer is dripped on a skin sample to form a multilayered structure for dynamically measuring the reflected THz-wave amplitude during water desorption. Skin penetration depths can be successfully derived by using the multilayered water–skin model and by considering the measured reflectivity, water dielectric constants, and effective thicknesses of the water overlayer on the skin sample. The maximum penetration depth is approximately 0.3 mm and is obtained with wave frequencies of 0.4–0.6 THz. This penetration depth encompasses the stratum corneum (SC) and part of the epidermis. The high penetration depth of 0.4–0.6 THz waves is also confirmed in the dried and damaged SC.

頁(從 - 到)22709-22721
期刊Optics Express
出版狀態Published - 2018 9月 3

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學


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