Diffuse terahertz spectroscopy in turbid media using a wavelet-based bimodality spectral analysis.

ABSTRACT: Current terahertz (THz) spectroscopy techniques only use the coherent light beam for spectral imaging. In the presence of electromagnetic scattering, however, the scattering-mitigated incoherent beams allow for flexible emitter-detector geometries, which enable applications such as seeing through turbid media. Despite this potential, THz spectroscopy using diffuse waves has not been demonstrated. The main obstacles are the very poor signal to noise ratios of the diffused fields and the resonance-like spectral artifacts due to multiple Mie scattering events that obscure the material absorption signatures. In this work, we demonstrate diffuse THz spectroscopy of a heterogeneous sample through turbid media using a novel technique based on the wavelet multiresolution analysis and the bimodalit

SUBMITTER: Khani ME 

PROVIDER: S-EPMC8611087 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature