Work

Highly sensitive terahertz measurement of layer thickness using a two-cylinder waveguide sensor

Year: 2010

Type: article

Abstract: We report on the layer thickness determination on dielectrically coated metal cylinders using terahertz (THz) time-domain spectroscopy. A considerable sensitivity increase of up to a factor of 150 is obtained for layers down to 2.5 μm thickness by introducing an experimental geometry based on a two-cylinder waveguide sensor. The layer attached on one metal cylinder is guided in contact with the second metal cylinder in the THz beam waist. This approach uses concepts of adiabatic THz wave compression and the advantages of THz waveguides. The results are compared to measurements on free-standing layers.

Source: Applied Physics Letters

DOI: 10.1063/1.3481080

Authors: M. Theuer, R. Beigang, D. Grischkowsky

Institutions: Oklahoma State University, Fraunhofer Institute for Physical Measurement Techniques, Fraunhofer-Gesellschaft, University of Kaiserslautern

Language: English

Topic: Terahertz technology and applications

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: bronze

OpenAlex ID: W1992911170

FWCI: 3.71

Cites: 17

Cited by: 38

Related to: 10