Measuring the Optical Absorption of Single Nanowires

Milo Yaro Swinkels; Alessio Campo; Daniel Vakulov; Wonjong Kim; Luca Gagliano; Simon Escobar Steinvall; Hermann Detz; Marta De Luca; Alois Lugstein; Erik Bakkers; Anna Fontcuberta I Morral; Ilaria Zardo

doi:10.1103/PhysRevApplied.14.024045

Measuring the Optical Absorption of Single Nanowires

Milo Yaro Swinkels, Alessio Campo, Daniel Vakulov, Wonjong Kim, Luca Gagliano, Simon Escobar Steinvall, Hermann Detz, Marta De Luca, Alois Lugstein, Erik Bakkers, Anna Fontcuberta I Morral, Ilaria Zardo (Corresponding author)

Onderzoeksoutput: Bijdrage aan tijdschrift › Tijdschriftartikel › Academic › peer review

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In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.

Originele taal-2	Engels
Artikelnummer	024045
Aantal pagina's	10
Tijdschrift	Physical Review Applied
Volume	14
Nummer van het tijdschrift	2
DOI's	https://doi.org/10.1103/PhysRevApplied.14.024045
Status	Gepubliceerd - 17 aug. 2020

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I.Z. has received funding from the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (Grant Agreement No. 756365) and Swiss National Science Foundation research grant (Project Grant No. 200021 165784). A.F.M. acknowledges funding from the Swiss National Science Foundation research grant (Project Grant No. BSCGI0-157705) and H2020 program through grant INDEED. H.D. acknowledges financial support by the Ministry of Education, Youth and Sports of the Czech Republic under the project CEITEC 2020 (LQ1601). M.D.L. acknowledges support from the Swiss National Science Foundation under the Ambizione grant (Grant No. PZ00P2 179801).

Financiers	Financiernummer
Horizon 2020 Framework Programme	756365
European Research Council
Schweizerischer Nationalfonds zur Förderung der Wissenschaftlichen Forschung	BSCGI0-157705, 200021 165784
Ministerstvo Školství, Mládeže a Tělovýchovy	LQ1601, PZ00P2 179801

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Measuring the Optical Absorption of Single Nanowires
Swinkels, M. Y. (Bijdrager), Campo, A. (Bijdrager), Vakulov, D. (Bijdrager), Kim, W. (Bijdrager), Gagliano, L. (Bijdrager), Steinvall, S. E. (Bijdrager), Detz, H. (Bijdrager), De Luca, M. (Bijdrager), Lugstein, A. (Bijdrager), Bakkers, E. (Bijdrager), Fontcuberta I Morral, A. (Bijdrager) & Zardo, I. (Bijdrager), Zenodo, 17 aug. 2020
DOI: 10.5281/zenodo.4010193
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AU - Campo, Alessio

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AU - Steinvall, Simon Escobar

AU - Detz, Hermann

AU - De Luca, Marta

AU - Lugstein, Alois

AU - Bakkers, Erik

AU - Fontcuberta I Morral, Anna

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AB - In this work we present a method to quantitatively measure the optical absorption of single nanowires that can be applied over a wide range of temperatures and with a high enough sensitivity to enable the measurement of below-band-gap absorption (as well as the absorption of single molecules). The method is based on accurately measuring the heat flow coming from a nanowire when it is illuminated by a laser beam. We experimentally verify this method by measuring the absorption of both a zincblende and a wurtzite GaAs, a wurtzite GaP, and a superlattice Zn3P2 nanowire. Furthermore, we find that the Zn3P2 nanowires have the largest absorption of all these materials. We analyze the advantages and disadvantages of the method and study its range of applicability.

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Measuring the Optical Absorption of Single Nanowires

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Measuring the Optical Absorption of Single Nanowires

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