Propagation of terahertz radiation through random structures: an alternative theoretical approach and experimental validation

Fletcher, J.R.; Swift, G.P.; Dai, De Chang; Levitt, J.A.; Chamberlain, J.M.

Abstract

A model describing the propagation of terahertz frequency radiation through inhomogeneous materials is proposed. In such materials (e.g., powders or clothing), the size of the scattering centers, their separation, and the wavelength of the radiation are all commensurate. A phase distribution function is used to model the optical properties of a randomly structured transmitting layer. The predictions of the model are compared with exact (Mie) theory for isolated spherical scatterers and with previously published experimental data. Measurements of the transmission of terahertz radiation through a variety of samples in order to validate the present model are also reported. These include arrays of cylinders, textiles, powders, and glass balls. Overall, satisfactory agreement between the experimental data and theoretical predictions is obtained.

Citation

Fletcher, J., Swift, G., Dai, D. C., Levitt, J., & Chamberlain, J. (2007). Propagation of terahertz radiation through random structures: an alternative theoretical approach and experimental validation. Journal of Applied Physics, 101(1), Article 013102. https://doi.org/10.1063/1.2403860

• Journal Article Type: Article
• Acceptance Date: Oct 20, 2006
• Online Publication Date: Jan 2, 2007
• Publication Date: Jan 2, 2007
• Deposit Date: Jan 9, 2009
• Publicly Available Date: Nov 3, 2011
• Journal: Journal of Applied Physics
• Print ISSN: 0021-8979
• Electronic ISSN: 1089-7550
• Publisher: American Institute of Physics
• Peer Reviewed: Peer Reviewed
• Volume: 101
• Issue: 1
• Article Number: 013102
• DOI: https://doi.org/10.1063/1.2403860
• Public URL: https://durham-repository.worktribe.com/output/1549106