Time-Domain Modelling of Pulsed Photoconducting Sources - Part II: Characterization of an LT GaAs Bow-Tie Antenna

Arturo Fiorellini Bernardis; Paolo Maria Sberna; Juan Bueno; Huasheng Zhang; Nuria Llombart; Andrea Neto

doi:10.1109/TAP.2023.3236763

Time-Domain Modelling of Pulsed Photoconducting Sources - Part II: Characterization of an LT GaAs Bow-Tie Antenna

Arturo Fiorellini Bernardis, Paolo Maria Sberna, Juan Bueno, Huasheng Zhang, Nuria Llombart, Andrea Neto^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › Scientific › peer-review

3 Citations (Scopus)

21 Downloads (Pure)

Abstract

Drude's description of the response of low-temperature gallium arsenide to optical pulse excitation is used to evaluate the components of a time-domain Norton equivalent circuit of a photoconductive antenna (PCA) source. The saturation of the terahertz (THz) radiated power occurring at large optical excitation levels was previously associated by the scientific community to radiation and charge screening of the bias. With the present circuit, we are able to model accurately the measured saturation as only due to the EM feedback from the antenna to the bias. The predicted THz radiated power is shown to match very accurately the measurements when the circuit is combined with an accurate description of the experimental conditions and the modeling of the THz quasi-optical (QO) channel.

Original language	English
Pages (from-to)	2536-2545
Number of pages	10
Journal	IEEE Transactions on Antennas and Propagation
Volume	71
Issue number	3
DOIs	https://doi.org/10.1109/TAP.2023.3236763
Publication status	Published - 2023

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

Keywords

Equivalent circuit
photoconductive antennas (PCAs)
terahertz (THz)
THz radiated power
THz sources
THz technology

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Time-Domain_Modelling_of_Pulsed_Photoconducting_SourcesPart_II_Characterization_of_an_LT_GaAs_Bow-Tie_AntennaFinal published version, 2.5 MB

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title = "Time-Domain Modelling of Pulsed Photoconducting Sources - Part II: Characterization of an LT GaAs Bow-Tie Antenna",

abstract = "Drude's description of the response of low-temperature gallium arsenide to optical pulse excitation is used to evaluate the components of a time-domain Norton equivalent circuit of a photoconductive antenna (PCA) source. The saturation of the terahertz (THz) radiated power occurring at large optical excitation levels was previously associated by the scientific community to radiation and charge screening of the bias. With the present circuit, we are able to model accurately the measured saturation as only due to the EM feedback from the antenna to the bias. The predicted THz radiated power is shown to match very accurately the measurements when the circuit is combined with an accurate description of the experimental conditions and the modeling of the THz quasi-optical (QO) channel.",

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author = "Bernardis, {Arturo Fiorellini} and Sberna, {Paolo Maria} and Juan Bueno and Huasheng Zhang and Nuria Llombart and Andrea Neto",

note = "Green Open Access added to TU Delft Institutional Repository {\textquoteleft}You share, we take care!{\textquoteright} – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.",

year = "2023",

doi = "10.1109/TAP.2023.3236763",

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AU - Sberna, Paolo Maria

AU - Bueno, Juan

AU - Zhang, Huasheng

AU - Llombart, Nuria

AU - Neto, Andrea

N1 - Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.

PY - 2023

Y1 - 2023

N2 - Drude's description of the response of low-temperature gallium arsenide to optical pulse excitation is used to evaluate the components of a time-domain Norton equivalent circuit of a photoconductive antenna (PCA) source. The saturation of the terahertz (THz) radiated power occurring at large optical excitation levels was previously associated by the scientific community to radiation and charge screening of the bias. With the present circuit, we are able to model accurately the measured saturation as only due to the EM feedback from the antenna to the bias. The predicted THz radiated power is shown to match very accurately the measurements when the circuit is combined with an accurate description of the experimental conditions and the modeling of the THz quasi-optical (QO) channel.

AB - Drude's description of the response of low-temperature gallium arsenide to optical pulse excitation is used to evaluate the components of a time-domain Norton equivalent circuit of a photoconductive antenna (PCA) source. The saturation of the terahertz (THz) radiated power occurring at large optical excitation levels was previously associated by the scientific community to radiation and charge screening of the bias. With the present circuit, we are able to model accurately the measured saturation as only due to the EM feedback from the antenna to the bias. The predicted THz radiated power is shown to match very accurately the measurements when the circuit is combined with an accurate description of the experimental conditions and the modeling of the THz quasi-optical (QO) channel.

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KW - photoconductive antennas (PCAs)

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KW - THz sources

KW - THz technology

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Time-Domain Modelling of Pulsed Photoconducting Sources - Part II: Characterization of an LT GaAs Bow-Tie Antenna

Abstract

Bibliographical note

Keywords

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