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Spectral filtering with diffractive reflection gratings for fast superconducting detectors in the THz frequency range

Schmid, A; Kuzmin, A; Wuensch, S; Ilin, K; Bruendermann, E; Scherhaufer, D; Mueller, A-S; Siegel, M

In this work we describe the design process of a grating spectrometer with fast superconducting THz detectors based on Niobiumnitride. The main application is the use as a diagnostic tool for accelerator-based sources of THz radiation like synchrotrons, where interactions of the electron bunches in storage ring lead to fluctuations in spectrum and intensity of the emitted radiation.

Guidelines for the design of the two main parts, grating and detector design, are given. Here, a blazed reflection grating for a frequency range of 1 THz to 5 THz has been developed and successfully fabricated in a high-precision milling process out of brass. Also three different planar antenna designs (double-slot, annular slot and log-per spiral) in combination with quasioptical bandpass filters for the THz range have been simulated and evaluated for best spectral resolution and power coupling.

Finally, we have verified grating performance for pulsed THz radiation of 1 THz in an experiment conducted at the synchrotron light source of the KIT. Excellent agreement of the grating performance to the simulations has been found.

Verlagsausgabe §
DOI: 10.5445/IR/1000126914
Veröffentlicht am 28.11.2021
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Beschleunigerphysik und Technologie (IBPT)
Institut für Mikro- und Nanoelektronische Systeme (IMS)
Institut für Mikroverfahrenstechnik (IMVT)
Publikationstyp Zeitschriftenaufsatz
Publikationsmonat/-jahr 06.2020
Sprache Englisch
Identifikator ISSN: 1742-6588, 1742-6596
KITopen-ID: 1000126914
HGF-Programm 54.01.01 (POF III, LK 01) ps- und fs-Strahlen
Erschienen in Journal of physics / Conference series
Verlag IOP Publishing
Band 1559
Seiten 012017
Projektinformation 05K2016- NeoDyn; TP: uFast (BMBF, EU 6. RP, 05K16VKA)
Vorab online veröffentlicht am 20.06.2020
Nachgewiesen in Scopus
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