Work

Terahertz homodyne spectroscopic imaging of concealed low-absorbing objects

Year: 2019

Type: article

Abstract: Terahertz (THz) homodyne and direct spectroscopic images of low-absorbing materials packaged between up to six layers of a cotton fabric are recorded at 0.3 and 0.6 THz at room temperature. More than two orders of magnitude higher dynamic range is revealed due to the detection in a homodyne scheme, which is realized using paper sheets as a phase-shifting mechanism. It is demonstrated that the homodyne approach can serve as a convenient imaging tool to identify and resolve objects manifesting low absorbance of THz radiation, such as paper tissue, nitrile, and low-density polyethylene concealed in a textile environment.

Source: Optical Engineering

DOI: 10.1117/1.oe.58.2.023104

Authors: Domas Jokubauskis, Linas Minkevičius, Dalius Seliuta, Irmantas Kašalynas, Gintaras Valušis

Institution: Center for Physical Sciences and Technology

Language: English

Topic: Terahertz technology and applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

Funder: Lietuvos Mokslo Taryba

Award: Kompaktiški integriniai THz komponentai ir spektroskopinio THz vaizdinimo sistemos