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- Title
Spectroscopic Evaluation of Epidermis‐Equivalent Phantom in Terahertz‐Frequency Region.
- Authors
Mizuno, Maya; Yamazaki, Shota; Nagaoka, Tomoaki
- Abstract
The complex refractive index and reflectance of an epidermis‐equivalent phantom were evaluated in the terahertz‐frequency region. The complex refractive indices of the epidermis and the epidermis‐equivalent phantom, made using ultrapure water, mineral oil, glycerin fatty acid ester, and agar, were measured using a terahertz time‐domain spectrometer. The complex refractive indices of the epidermis and the epidermis‐equivalent phantom were in agreement. However, their mean reflectances had a difference of approximately 3%. The difference disappeared on adding surface roughness to the epidermis‐equivalent phantom. Thus, we found that roughness of the surface of the epidermis‐equivalent phantom was required to ensure a match of the reflectance of the phantom with that of the epidermis at frequencies from 0.2 THz to 0.6 THz. Key Points: The complex refractive index and reflectance of an epidermis‐equivalent phantom were evaluated in the terahertz frequency regionComplex refractive indices of the epidermis of porcine skin and the epidermis‐equivalent phantom were compared using a THz spectrometerA rough surface of the epidermis‐equivalent phantom was required to match the reflectance of the phantom with that of the epidermis
- Subjects
FATTY acid esters; REFRACTIVE index; SURFACE roughness; MINERAL oils; ROUGH surfaces
- Publication
Radio Science, 2024, Vol 59, Issue 3, p1
- ISSN
0048-6604
- Publication type
Article
- DOI
10.1029/2023RS007809