Attenuation of THz Beams: A "How to" Tutorial

Korbinian J. Kaltenecker; Edmund Kelleher; Binbin Zhou; Peter Uhd Jepsen

doi:10.1007/s10762-019-00608-x

Attenuation of THz Beams: A "How to" Tutorial

Korbinian J. Kaltenecker (Invited author), Edmund Kelleher (Invited author), Binbin Zhou (Invited author), Peter Uhd Jepsen (Invited author)

Center for Nanostructured Graphene

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Abstract

Attenuation of ultrashort THz pulses poses a significant technological challenge due to the broadband nature of such light pulses. Several methods exist for this purpose, including crossed wire grid polarizers, high refractive index, high resistivity silicon wafers, and ultrathin metal films. In this review, we discuss the operational principles of these methods, and highlight some of the advantages and potential pitfalls of the methods. We describe the limits of high-frequency operation of wire grid polarizers, relevant for contemporary ultra-broadband THz sources in air photonics. We discuss the effects of multiple reflections and interference in sequences of silicon wafers for attenuation, and finally discuss the potential of using ultrathin metallic films for broadband attenuation.

Original language	English
Journal	Journal of Infrared, Millimeter and Terahertz Waves
Volume	40
Issue number	8
Pages (from-to)	878–904
ISSN	1866-6892
DOIs	https://doi.org/10.1007/s10762-019-00608-x
Publication status	Published - 2019

Keywords

Attenuation of terahertz beams
Time-domain measurements
Tutorial

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10.1007/s10762-019-00608-x

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AU - Kelleher, Edmund

AU - Zhou, Binbin

AU - Jepsen, Peter Uhd

PY - 2019

Y1 - 2019

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AB - Attenuation of ultrashort THz pulses poses a significant technological challenge due to the broadband nature of such light pulses. Several methods exist for this purpose, including crossed wire grid polarizers, high refractive index, high resistivity silicon wafers, and ultrathin metal films. In this review, we discuss the operational principles of these methods, and highlight some of the advantages and potential pitfalls of the methods. We describe the limits of high-frequency operation of wire grid polarizers, relevant for contemporary ultra-broadband THz sources in air photonics. We discuss the effects of multiple reflections and interference in sequences of silicon wafers for attenuation, and finally discuss the potential of using ultrathin metallic films for broadband attenuation.

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KW - Time-domain measurements

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Attenuation of THz Beams: A "How to" Tutorial

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