Electrically Tunable Terahertz Notch Filters

Electrically Tunable Terahertz Notch Filters

In this letter we present a switchable THz notch filter. The filter contains a liquid crystal layer that acts as a half wave retarder in one state and as an isotropic layer in the other state. The device combines three unique properties: it can be switched electrically, it provides a filter depth of...

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Veröffentlicht in:Journal of infrared, millimeter and terahertz waves millimeter and terahertz waves, 2012-03, Vol.33 (3), p.327-332
Hauptverfasser: Vieweg, N., Born, N., Al-Naib, I., Koch, M.
Format: Artikel
Sprache:eng
Schlagworte:
Classical Electrodynamics
Devices
Electrical Engineering
Electronics and Microelectronics
Engineering
Frequency ranges
Infrared
Instrumentation
Liquid crystals
Noise levels
Notch filters
Retarders
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Beschreibung
Zusammenfassung:In this letter we present a switchable THz notch filter. The filter contains a liquid crystal layer that acts as a half wave retarder in one state and as an isotropic layer in the other state. The device combines three unique properties: it can be switched electrically, it provides a filter depth of 35 dB at 350 GHz and it can be tuned over wide frequency range from 350 GHz to 700 GHz.
ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-012-9877-y