On the Power Radiated by Photo Conductive Sources

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

doi:10.1109/IRMMW-THz50926.2021.9567350

On the Power Radiated by Photo Conductive Sources

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

Research output: Contribution to conference › Abstract › Scientific

Abstract

The time evolution of voltages and currents in a pulsed photo conductive antenna (PCA) source is evaluated resorting to a rigorous procedure that stems from semiconductor physics first, to define the phenomena involved in the generation of the photocurrent, and then relies on an equivalent circuit in time domain, providing a direct estimation of the power generated by the PCA as well as its spectral distribution. The circuit model is validated via a campaign of measurements of standard PC antenna sources. The saturation phenomena in the THz radiated power occurring at large optical excitation levels, previously observed by the scientific community and associated to different phenomena, are accurately predicted by the present method, which ascribe their main cause to the feedback from the antenna: indeed, the electromagnetic field generated by the device tend to reduce the strength of the forcing field used to accelerate the photo-carriers.

Original language	English
Number of pages	1
DOIs	https://doi.org/10.1109/IRMMW-THz50926.2021.9567350
Publication status	Published - 2021
Event	46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021 - Chengdu, China Duration: 30 Aug 2021 → 3 Sep 2021

Conference

Conference	46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021
Country/Territory	China
City	Chengdu
Period	30/08/21 → 3/09/21

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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10.1109/IRMMW-THz50926.2021.9567350

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title = "On the Power Radiated by Photo Conductive Sources",

abstract = "The time evolution of voltages and currents in a pulsed photo conductive antenna (PCA) source is evaluated resorting to a rigorous procedure that stems from semiconductor physics first, to define the phenomena involved in the generation of the photocurrent, and then relies on an equivalent circuit in time domain, providing a direct estimation of the power generated by the PCA as well as its spectral distribution. The circuit model is validated via a campaign of measurements of standard PC antenna sources. The saturation phenomena in the THz radiated power occurring at large optical excitation levels, previously observed by the scientific community and associated to different phenomena, are accurately predicted by the present method, which ascribe their main cause to the feedback from the antenna: indeed, the electromagnetic field generated by the device tend to reduce the strength of the forcing field used to accelerate the photo-carriers.",

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

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. ; 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021 ; Conference date: 30-08-2021 Through 03-09-2021",

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AU - Bernardis, Arturo Fiorellini

AU - Zhang, Huasheng

AU - Sberna, Paolo

AU - Bueno, Juan

AU - Neto, Andrea

AU - Llombart, Nuria

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 - 2021

Y1 - 2021

N2 - The time evolution of voltages and currents in a pulsed photo conductive antenna (PCA) source is evaluated resorting to a rigorous procedure that stems from semiconductor physics first, to define the phenomena involved in the generation of the photocurrent, and then relies on an equivalent circuit in time domain, providing a direct estimation of the power generated by the PCA as well as its spectral distribution. The circuit model is validated via a campaign of measurements of standard PC antenna sources. The saturation phenomena in the THz radiated power occurring at large optical excitation levels, previously observed by the scientific community and associated to different phenomena, are accurately predicted by the present method, which ascribe their main cause to the feedback from the antenna: indeed, the electromagnetic field generated by the device tend to reduce the strength of the forcing field used to accelerate the photo-carriers.

AB - The time evolution of voltages and currents in a pulsed photo conductive antenna (PCA) source is evaluated resorting to a rigorous procedure that stems from semiconductor physics first, to define the phenomena involved in the generation of the photocurrent, and then relies on an equivalent circuit in time domain, providing a direct estimation of the power generated by the PCA as well as its spectral distribution. The circuit model is validated via a campaign of measurements of standard PC antenna sources. The saturation phenomena in the THz radiated power occurring at large optical excitation levels, previously observed by the scientific community and associated to different phenomena, are accurately predicted by the present method, which ascribe their main cause to the feedback from the antenna: indeed, the electromagnetic field generated by the device tend to reduce the strength of the forcing field used to accelerate the photo-carriers.

KW - Equivalent circuit

KW - Photoconductive antennas (PCAs)

KW - Terahertz (THz)

KW - THz radiated power

KW - THz sources

KW - THz technology

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DO - 10.1109/IRMMW-THz50926.2021.9567350

M3 - Abstract

AN - SCOPUS:85125336146

T2 - 46th International Conference on Infrared, Millimeter, and Terahertz Waves, IRMMW-THz 2021

Y2 - 30 August 2021 through 3 September 2021

ER -

On the Power Radiated by Photo Conductive Sources

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Keywords

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