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International System of Units (SI) Traceable Noise-Equivalent Power and Responsivity Characterization of Continuous Wave ErAs:InGaAs Photoconductive Terahertz Detectors

Fernandez Olvera, Anuar de Jesus ; Roggenbuck, Axel ; Dutzi, Katja ; Vieweg, Nico ; Lu, Hong ; Gossard, Arthur C. ; Preu, Sascha (2020)
International System of Units (SI) Traceable Noise-Equivalent Power and Responsivity Characterization of Continuous Wave ErAs:InGaAs Photoconductive Terahertz Detectors.
In: Photonics, 2019, 2019 (1)
doi: 10.25534/tuprints-00011362
Article, Secondary publication, Publisher's Version

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Item Type: Article
Type of entry: Secondary publication
Title: International System of Units (SI) Traceable Noise-Equivalent Power and Responsivity Characterization of Continuous Wave ErAs:InGaAs Photoconductive Terahertz Detectors
Language: English
Date: 24 January 2020
Place of Publication: Darmstadt
Year of primary publication: 2019
Journal or Publication Title: Photonics
Volume of the journal: 2019
Issue Number: 1
Series Volume: 6
DOI: 10.25534/tuprints-00011362
Corresponding Links:
Origin: Secondary publication
Abstract:

A theoretical model for the responsivity and noise-equivalent power (NEP) of photoconductive antennas (PCAs) as coherent, homodyne THz detectors is presented. The model is validated by comparison to experimental values obtained for two ErAs:InGaAs PCAs. The responsivity and NEP were obtained from the measured rectified current, the current noise floor in the PCAs, and the incoming THz power for the same conditions. Since the THz power measurements are performed with a pyroelectric detector calibrated by the National Metrology Institute of Germany (PTB), the experimentally obtained values are directly traceable to the International System of Units (SI) for the described conditions. The agreement between the presented model and the experimental results is excellent using only one fitting parameter. A very low NEP of 1.8 fW/Hz at 188.8 GHz is obtained at room temperature.

Uncontrolled Keywords: Coherent THz detectors; photoconductive antennas; responsivity; NEP; homodyne detection
Status: Publisher's Version
URN: urn:nbn:de:tuda-tuprints-113623
Classification DDC: 500 Science and mathematics > 530 Physics
600 Technology, medicine, applied sciences > 600 Technology
600 Technology, medicine, applied sciences > 620 Engineering and machine engineering
Divisions: 18 Department of Electrical Engineering and Information Technology > Institute for Microwave Engineering and Photonics (IMP) > Terahertz Devices and Systems
Date Deposited: 24 Jan 2020 08:14
Last Modified: 08 Aug 2024 05:39
URI: https://tuprints.ulb.tu-darmstadt.de/id/eprint/11362
PPN: 508979986
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