Fiber Coupled Transceiver with 6.5 THz Bandwidth for Terahertz Time-Domain Spectroscopy in Reflection Geometry

We present a fiber coupled transceiver head for terahertz (THz) time-domain reflection measurements. The monolithically integrated transceiver chip is based on iron (Fe) doped In0.53Ga0.47As (InGaAs:Fe) grown by molecular beam epitaxy. Due to its ultrashort electron lifetime and high mobility, InGaA...

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Published inSensors (Basel, Switzerland) Vol. 20; no. 9; p. 2616
Main Authors Kohlhaas, Robert B., Liebermeister, Lars, Breuer, Steffen, Amberg, Marcel, Felipe, David de, Nellen, Simon, Schell, Martin, Globisch, Björn
Format Journal Article
LanguageEnglish
Published Switzerland MDPI 04.05.2020
MDPI AG
Subjects
non-destructive testing
photoconductive antennas
THz imaging
THz time-domain spectroscopy
THz transceiver
THz time-domain spectroscopy
THz imaging
THz transceiver
photoconductive antennas
non-destructive testing
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Summary:We present a fiber coupled transceiver head for terahertz (THz) time-domain reflection measurements. The monolithically integrated transceiver chip is based on iron (Fe) doped In0.53Ga0.47As (InGaAs:Fe) grown by molecular beam epitaxy. Due to its ultrashort electron lifetime and high mobility, InGaAs:Fe is very well suited as both THz emitter and receiver. A record THz bandwidth of 6.5 THz and a peak dynamic range of up to 75 dB are achieved. In addition, we present THz imaging in reflection geometry with a spatial resolution as good as 130 µm. Hence, this THz transceiver is a promising device for industrial THz sensing applications.
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ISSN:1424-8220
1424-8220
DOI:10.3390/s20092616