Title :
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
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;
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
DOI :
10.1109/ICIMW.2007.4516508
