Resonant metal gratings for THz material characterization

Author

Gobel, T. ; Schö, Daniel ; Sydlo, Cezary ; Feiginov, Michael ; Meissner, Peter ; Hartnagel, H.L.

Author_Institution

Inst. fur Hochfrequenztech., Tech. Univ. Darmstadt, Darmstadt

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

301

Lastpage

302

Abstract

Metal films with periodic perforations become highly transparent for wavelengths close to the grating period. The attachment of dielectric films changes the resonant features of such gratings, namely the frequency of the transmission resonance. Measurements with a continuous wave (CW) optical-heterodyne THz system at 100 GHz demonstrate, that such grating sensors allow the accurate extraction of the permittivity of the attached films out of the induced frequency shift.

Keywords

diffraction gratings; millimetre wave measurement; permittivity measurement; THz material characterization; continuous wave optical-heterodyne THz system; dielectric films; frequency 100 GHz; grating period; grating sensors; metal films; periodic perforations; permittivity; resonant metal gratings; transmission resonance frequency; Dielectric films; Dielectric materials; Dielectric measurements; Frequency; Gratings; Inorganic materials; Optical films; Optical materials; Optical sensors; Resonance;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-1438-3

Type

conf

DOI

10.1109/ICIMW.2007.4516508

Filename

4516508