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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Bibliographic Details
Published inJournal of infrared, millimeter and terahertz waves Vol. 33; no. 3; pp. 327 - 332
Main Authors Vieweg, N., Born, N., Al-Naib, I., Koch, M.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.03.2012
Springer Nature B.V
Subjects
Classical Electrodynamics
Devices
Electrical Engineering
Electronics and Microelectronics
Engineering
Frequency ranges
Infrared
Instrumentation
Liquid crystals
Noise levels
Notch filters
Retarders
Switchable terahertz devices
Birefringence
Liquid crystals
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Summary: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.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
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ISSN:1866-6892
1866-6906
DOI:10.1007/s10762-012-9877-y